Fun game! Really one of those games that makes the most out of simple mechanics. The first level left me wanting a bit more; more enemies, more things in the game to engage with. And then the second level delivered with new visuals, enemies, and unlockable doors.
One thing I would've liked to see would've been some camera smoothing: Right now, if you go from moving to one side to the other, the camera snaps, as it is not centered. Some smoothing on this would make that a bit less jarring.
Overall very well done though!