Great gameplay - pretty challenging! I'd recommend adding some info about controls somewhere in your game, maybe as a textbox like the one in the first level? Took me a bit to realize that I needed to use WASD. During the second level, I was able to take the camera far left, past the edge of the terrain - adding a distance constraint to the camera, or adding invisible boxes at the edges of your level, would help to add extra polish.
Good game!