The main character's sprite and the walking animation send me vibes from Chrono Trigger, I like it
I'd say maybe increase the cat's hitbox or the bullet's. Or adjust the pathfinding to the player's head, because it is a bit annoying having to go down to hit some enemies that are on your sides (or maybe the game is fine being this way, idk)
You could also show a time bar above the player's head showing how much time is left on a powerup, but this may be a bit tricky if you want to stack them, I just want to give ideas on how you could possibly make the game better
Cool game