Great game, good presentation, it could be helpful to mark the end of the gravity zones.

Cool idea. I particularly enjoyed the negative-gravity levels.

I would recommend adding some music and sound effects. In the world of audio, a little bit of effort can go a long way--even if it's not great, it still makes the game world feel more alive.

I don't know if it is just me but the wegl is not scaling right.

Post processing was nice and movement felt smooth, nice.

As you mentioned, the web version doesn't work, but the pc version works well, except that you can't go to the menu after completing the game. But overall good job.