Very difficult but once you get the hang of it it feels fair and consistent. The one issue I have is that, we can only attack in 8 directions but it sometimes feels like the enemy is a few pixels out of alignment meaning you can't actually hit them. Maybe increase the hitbox sizes or - if they actually are perfectly aligned and it just *feels* off - maybe show a flash of their silhouette for near misses.
I am really enjoying this though and will probably play a lot more!