That was way better than I expected with "small demo". I'm not sure how I was doing (I'd probably have died in two seconds if I could have), but that was ALMOST a game. The art was good, it had music, it had sound effects, the controls were responsive.. it even has a menu with volume control (which I always want to make in my entries, but always gets cut).
I specially liked the cactus attacks. It shots spines. Of course.