The art is simple and very good, bringing the MS Paint vibe. I liked the bazooka cat sprite a lot! =D
The music is great and combining with the art, and the sound effects are good too.
The levels are very good, I liked the type of enemies and the challenges!
Sometimes I got surprised by the enemy who comes bouncing just after entering a room. Perhaps it could have a delay time before start moving.
The commands are good, but sometimes I confused the K button with the J button.
If I press the fire button too fast, the player stops firing, and only starts to shoot again when I turn to the other direction, throwing at the same time all the shots that should have come out.
Congratulations for the game, it's very good!! I had a lot of fun playing it!