Pretty interesting idea. Was fun to play. Here is some feedback for the game.
The player blends into the background making it very hard to see.
The camera movement is way too slow and often times lead to death since the player moves way faster.
Having the up arrow as jump makes it a bit tougher than needed, jump would have been better served on space.
Also, just my personal preference, the arrow keys for movement make controls clunky, should map to WASD. Just some feedback for games in the future.
Overall, good job!