OK, so, first off, thanks a lot for fixing the screen shaking in the webGL build, it became much easier to look at (and I also beat it on my first try without the shaking, so I get to blame the endless shaking on me losing before).
A cool idea! The flipping from 2D to 3D is awesome! The 3D tunnels sometimes not being quite straight breaks immersion a bit, but well, 'tis a game jam.
Overall, super cool that you got procedural generation working! It fits the theme really well and is a fun game to play!