This game feels rough. The visuals are nice and the mechanics are good for what they are,however, there is a bunch of questionable design choices made.
You need to introduce the mechanics of the game to the audience. There's no need to shove it down their throat but you need to introduce it to audience in some shape or form.
Why does the line that points to your curser not match your curved trajectory? I can get that you want the player to identify the relation between the mouse and the origin of the shot but still. The straight line implies no gravity.
Also you might wana change the game size or crop the background. The extra space on the sides just detracts from the visuals.
I get that this is a game jam game, but good fundamental design before working can make all the difference!
Hope this feedback helps!