Cool game! The visuals and the 3d pixelated look gave the game a slick look.
Funny enough, I think the glitch y'all have in the game currently, with the infinite jump. seems kind of like a cool concept to play with. Originally, I didn't even realize it was infinite and thought it was like a jetpack for adjusting my landing. I swear for the life of me without it, I would've missed every rocket jump I attempted.
I think my only bit of critique would probably be regarding aim. I had to adjust the sensitivity on my mouse to get the right feel I liked for aiming my cannon. Something I'd probably look into including for this game if you continue it, would probably be the ability to customize your sensitivity. If I didn't have a special mouse, I would've struggled playing this game.
Regardless, the game's got charm!