Thank you for all the encouraging feedback :).
Yes the second loop falls a bit short, I agree. The original file was longer, but had to be cut to be able to build on web gl. Could be improved though.
The origin of the footsteps is me poking my violin mic :D that's why it's a bit dry. Adding reverb to it is a good idea to make it more pleasant I will keep it in mind.
No promises continuing the game, but we had a couple of game mechanics that could fit some other levels. To give you an idea the color was supposed to arrive gradually instead of unlocking it with the last piece. It's possible we try to add them at some point :P .
Great ideas and comments!