Nice game, but without music.
I wish there was a checkpoint system or something cause the first level was quite borring to replay.
Another thing I want to comment is the use of the scanline shader or overlay.
Scanlines must separate the pixels in the native resolution of the game, seems like you choosed a higher resolution for your game than what those scanlines supposed to be used.
This gives a strange outcome at least to me as I am used at scanlines.