Fear Less! experiences text issues, making text harder to read:

NG Player, for comparison:

Played about a fifth of the way through.

Experienced what felt like an unusually long preloader, and experienced constant slowdown during gameplay.

Given the heavy use of physics objects, this seems like a good performance benchmark for Ruffle.

Played for a few minutes in singleplayer, experienced no issues.

[enable ruffle]

Played a few stages, experienced no issues.

[enable ruffle]

Switching the other two over, will have to keep tabs on Boombot!

Played until the brutally hard Act 9, experienced no issues.

[enable ruffle]

Played and finished the first three puzzles, and tried the fourth, experienced no issues.

[enable ruffle]

Played for quite a while - only issue I could find was text getting clipped:

Thiis was a pretty minor issue in my eyes, so [enable ruffle]

Ran through a couple of matakukos' oldest games for testing today.

Played a single game, found no issues.

[enable ruffle]

Played a single game on Arena 1, found no issues.

[enable ruffle]

Quickly played through Level 1 a couple times, found no issues.

[enable ruffle]

Played through the first level.

Experienced frequent slowdown, and noticed an issue with the textbox showing what your last eaten object was:

Played a single game (up to level 6), experienced no issues.

[enable ruffle]

Ended up going through a bunch of Miniclip's earliest submissions, most of which had no issues:

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle] [also holy shit this got submitted two hours before 9/11]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

Game does not load, either on NG Player or Ruffle.

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

Player's score disappears after finishing Level 1.

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

Text is a different font between Ruffle and NG Player - doesn't seem like a major issue to me.

Sidenote: I wish there was an easier way to switch between using NG Player and Ruffle than editing the submission URL.

Ended up playing through a few more Miniclip games afterwards, partially for fun:

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

Game fails to load in NG Player and Ruffle, freezing on a white screen

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

Game fails to load, on both NG Player and Ruffle

EDIT:

Game is utterly broken in Ruffle - not only is it a slideshow, but walls don't work properly.

A wall does occasionally pop into view, but it spontaneously despawns shortly afterward.

Definitely keep an eye on this one.

Ended up finding out ArcadeTown had an account and ran through all three games on it.

Eliminating blox doesn't cause a score popup, and eliminating three blox plays the wrong SFX.

Played up to Mission 3, found no issues.

[enable ruffle]

Played up to Level 6, found no issues.

[enable ruffle]

Ran through most of Coolio-Niato's games catalog today:

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

SFX from the tiles is cut short in both NG Player and ruffle.

[enable ruffle] since this appears to be working correctly.

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

[enable ruffle]

Ruffled!

In this case, all of these appear to have already had Ruffle enabled. On your account page, do you have it set to use Ruffle when possible?

I didn't - probably disabled it some time ago and forgot about it.

Thanks for pointing it out!

Played for a single launch, stopped due to serious slowdown.

NG Player has virtually no slowdown by comparison.

[disable ruffle]

Played a single game in Ruffle and NG Player, found no differences.

[enable ruffle]

Played a single game in NG Player and Ruffle, found no differences.

[enable ruffle]

(Enable Ruffle For These Games)

i guess this crew is about fixing games and movies that dont work with flash, so heres a game that you can play in newgrounds player but not in flash:

(Enable Ruffle)

Played through the full game, experienced no issues.

[enable ruffle]

Played a few levels.

Typed in letters do not appear on screen, and a word's properties cannot be altered. This makes level 4 unfinishable.

(Enable Ruffle)

here are a few i forgot to include from the same authors:

(enable ruffle)

(enable ruffle)

(enable ruffle)

i played this some months ago in newgrounds player because its impossible to play it with ruffle since the game crashes. i hope you can fix this Tom

I'll turn off Ruffle for this one.

Found some games from Miniclip. Enable Ruffle:

Game crashes upon clicking a link to go to the game's walkthrough, making the medal "Exasperated" unearnable in Ruffle.

I've copy-pasted the debug info, in case it helps:

# Error Info
Error name: Error
Error message: panicked at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys/wasm/../unsupported/locks/mutex.rs:20:9:
assertion `left == right` failed: cannot recursively acquire mutex
  left: true
 right: false
Error stack:
```
69/J/n.wbg.__wbg_new_28c511d9baebfa89@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:73906
js_sys::Error::new::ha368c9ce23eebad4@:wasm-function[13908]:0xb1523f
core::ops::function::FnOnce::call_once{{vtable.shim}}::h9c4751e459e0dc59@:wasm-function[11514]:0xabfeef
std::panicking::rust_panic_with_hook::h1e6ac5d404b8e31b@:wasm-function[7071]:0x9863f5
core::panicking::panic_fmt::h87755523850ece9e@:wasm-function[11224]:0xab9849
core::panicking::assert_failed_inner::h161125ff96c9e54a@:wasm-function[4922]:0x878cba
core::panicking::assert_failed::hea0099895d8107cd@:wasm-function[11267]:0xabad4d
ruffle_core::loader::Loader::load_vars_loader::{{closure}}::h96e62824a7afe898@:wasm-function[2950]:0x6eabb4
<ruffle_web::navigator::WebNavigatorBackend as ruffle_core::backend::navigator::NavigatorBackend>::spawn_future::{{closure}}::h5b2dcfc9e99d5884@:wasm-function[1445]:0x4688b8
wasm_bindgen_futures::queue::Queue::new::{{closure}}::h1d221e0e2fafc54e@:wasm-function[4082]:0x7f7eef
<dyn core::ops::function::FnMut<(A,)>+Output = R as wasm_bindgen::closure::WasmClosure>::describe::invoke::h388e4fb64139afb5@:wasm-function[12525]:0xade20c
closure8614 externref shim@:wasm-function[12837]:0xae9ed0
E@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:3555
c@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:2764
69/J/n.wbg.__wbg_open_cc82b8aaf0c296c1/<@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:41693
k@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:3708
69/J/n.wbg.__wbg_open_cc82b8aaf0c296c1@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:41660
<ruffle_web::navigator::WebNavigatorBackend as ruffle_core::backend::navigator::NavigatorBackend>::navigate_to_url::h8bb0c6808aeb403d@:wasm-function[829]:0x19b07a
ruffle_core::avm1::activation::Activation::do_action::h559fb91770eb7969@:wasm-function[1306]:0x405751
ruffle_core::avm1::function::Executable::exec::hdc8cee346ec8b60b@:wasm-function[865]:0x1e0fe8
<ruffle_core::avm1::object::Object as ruffle_core::avm1::object::TObject>::call_method::h9152e876cfb2cbd4@:wasm-function[7589]:0x9aa5b3
ruffle_core::avm1::activation::Activation::do_action::h559fb91770eb7969@:wasm-function[1306]:0x4004e2
ruffle_core::avm1::function::Executable::exec::hdc8cee346ec8b60b@:wasm-function[865]:0x1e0fe8
<ruffle_core::avm1::object::Object as ruffle_core::avm1::object::TObject>::call_method::h9152e876cfb2cbd4@:wasm-function[7589]:0x9aa5b3
ruffle_core::avm1::activation::Activation::do_action::h559fb91770eb7969@:wasm-function[1306]:0x4004e2
ruffle_core::avm1::function::Executable::exec::hdc8cee346ec8b60b@:wasm-function[865]:0x1e0fe8
<ruffle_core::avm1::object::Object as ruffle_core::avm1::object::TObject>::call_method::h9152e876cfb2cbd4@:wasm-function[7589]:0x9a9ed6
ruffle_core::avm1::runtime::Avm1::run_stack_frame_for_method::h54736ea480d31dd7@:wasm-function[2355]:0x62c375
ruffle_core::player::Player::run_actions::h2d5b2442b54412ba@:wasm-function[1116]:0x35f8d6
ruffle_core::player::Player::update_mouse_state::hc0f7ef17c9124940@:wasm-function[827]:0x198d10
ruffle_core::player::Player::handle_event::h754c73e6e3f18b96@:wasm-function[781]:0x11eee2
ruffle_web::Ruffle::with_instance::ha5bca576b6fd7af4@:wasm-function[1209]:0x3b6349
ruffle_web::Ruffle::new_internal::{{closure}}::{{closure}}::{{closure}}::h1dd4131e1b63ab15@:wasm-function[13432]:0xb0433e
wasm_bindgen::convert::closures::invoke1_mut::h2bae26984665f0d7@:wasm-function[12471]:0xaddb55
closure444 externref shim@:wasm-function[12834]:0xae9e91
v@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:2924
c@https://uploads.ungrounded.net/ruffle_wrapper/lib/core.ruffle.951b6dbcf877cc86896c.js:1:2764

```

# Player Info
Allows script access: false
Renderer: wgpu
Adapter Backend: Gl
Adapter Name: "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0), or similar"
Adapter Device Type: IntegratedGpu
Adapter Driver Name: ""
Adapter Driver Info: ""
Enabled features: Features(FLOAT32_FILTERABLE | TEXTURE_COMPRESSION_BC | TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES | SHADER_UNUSED_VERTEX_OUTPUT)
Available features: Features(PUSH_CONSTANTS | CLEAR_TEXTURE | MULTIVIEW)
Current limits: Limits { max_texture_dimension_1d: 16384, max_texture_dimension_2d: 16384, max_texture_dimension_3d: 2048, max_texture_array_layers: 256, max_bind_groups: 4, max_bindings_per_bind_group: 1000, max_dynamic_uniform_buffers_per_pipeline_layout: 8, max_dynamic_storage_buffers_per_pipeline_layout: 0, max_sampled_textures_per_shader_stage: 16, max_samplers_per_shader_stage: 16, max_storage_buffers_per_shader_stage: 0, max_storage_textures_per_shader_stage: 0, max_uniform_buffers_per_shader_stage: 11, max_uniform_buffer_binding_size: 65536, max_storage_buffer_binding_size: 0, max_vertex_buffers: 8, max_buffer_size: 268435456, max_vertex_attributes: 16, max_vertex_buffer_array_stride: 255, min_uniform_buffer_offset_alignment: 256, min_storage_buffer_offset_alignment: 256, max_inter_stage_shader_components: 120, max_compute_workgroup_storage_size: 0, max_compute_invocations_per_workgroup: 0, max_compute_workgroup_size_x: 0, max_compute_workgroup_size_y: 0, max_compute_workgroup_size_z: 0, max_compute_workgroups_per_dimension: 0, max_push_constant_size: 0, max_non_sampler_bindings: 1000000 }
Surface quality: high
Surface samples: 4
Surface size: (640, 450, 1)

# Page Info
Page URL: https://uploads.ungrounded.net/ruffle_wrapper/ruffleembed.html?v=1.0.67&browsermode=default&props=%7B%22ruffle%22%3A%22%2Fruffle_wrapper%2Flib%2Fruffle.js%3F1710047728%22%2C%22public_path%22%3A%22%2Fruffle_wrapper%2Flib%2F%22%2C%22swf%22%3A%22https%3A%2F%2Fuploads.ungrounded.net%2F484000%2F484931_peeps.swf%3F1509024282%22%2C%22vars%22%3A%7B%22ngio_session_id%22%3A%2213430283.298ceb1d63ee56264d44e49a64f2990b3b6d9332fd2921%22%2C%22NewgroundsAPI_PublisherID%22%3A1%2C%22NewgroundsAPI_SandboxID%22%3A%2265ee3892821fc%22%2C%22NewgroundsAPI_SessionID%22%3A%224D3wTt0WmlHiMsK0PxvIfa01cc69332d8d6d3e91cc0a9e97a9cf87b8945dwDrK%22%2C%22NewgroundsAPI_UserName%22%3A%22BlueMonday1984%22%2C%22NewgroundsAPI_UserID%22%3A14526566%2C%22ng_username%22%3A%22BlueMonday1984%22%7D%2C%22width%22%3A640%2C%22height%22%3A450%2C%22icon%22%3A%22https%3A%2F%2Fpicon.ngfiles.com%2F484000%2Fflash_484931_card.png%3Ff1609851325%22%2C%22warnOnUnsupportedContent%22%3Afalse%7D
SWF URL: https://uploads.ungrounded.net/484000/484931_peeps.swf?1509024282

# Browser Info
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0
Platform: Win32
Has touch support: false

# Ruffle Info
Version: 0.1.0
Name: nightly 2024-03-10
Channel: nightly
Built: 2024-03-10T00:05:34.457Z
Commit: 2065661874083687135807b622d5972972684967
Is extension: false

# Metadata
width: 640
height: 450
frameRate: 35
numFrames: 19
swfVersion: 9
backgroundColor: #999999
isActionScript3: false
uncompressedLength: 12314677

have you tried running the game in chrome?

I checked, and it works on Chrome. Seems the issue's limited to Firefox.

Again i found these games. Enable Ruffle:

i know everyone plays newgrounds rumble with newgrounds player, but if its possible without any bugs, it could be played with ruffle: