The game felt very polished once you start playing. This definitely feels like it should be bundled with those old Atari games!
The music was a little odd for the style, but I didn't have a problem with it.
The graphics felt very bright and lively. Took me a while to figure out what some things were though, due to the low resolution, haha.
The overall design was also pretty good. Simple rules lead to an appropriate level of difficulty and gameplay.
First thing I tried to do was jump... which made the camera move downwards (press space). Definitely a game-breaking bug you should fix :)
Keep at it! :D