That was really charming! The gameplay is simple, but the level design brings out the most of the simple mechanics. The soundtrack is especially proficient!
In the later, louder parts of the game, some of the sound effects can stack and peak the audio above +0.0 dB. It's not a big problem, just something to watch out for.
The web camera viewport, both on Firefox and Chrome, seems to fit to height and then stretch left and right, which can create some weird camera sizes.
All-in-all, great work!