Hit anticipation could have been improved mainly by sound clues as visual clues would be hard to see due the nature of the game's artstyle which is very vibrant by itself, also the music will obfuscate a lot the visual too (sounds also interact with visuals, so a more intense music will cause visual hints to blur a little). The only way I would have done it without changing the entire art direction is lowering the saturation and light a little of the overall game and using neon lights in general to indicate danger + sounds. Regarding the damage it would be cool a more distinct sound and that the music muffles a little.