Goodness, this is fantastic! Very ambitious, very fun. I’m always surprised when a 3D game like this runs so smoothly in the browser.
The simple run-and-collect mechanics work very well here, the controls make the platforming just challenging enough to feel very rewarding, the sound design is really solid. I really enjoyed the views of areas down below, the dawning realization that there’s a crashed rocket in the ground that’s the same as the one you’re trying to get into, the doom and gloom of every falling mushroom.
+1 to another commenter for the helpfulness of a shadow for platforming, and maybe the level design could be reorganized a bit to make use of the whole torus before the end unlocks (maybe some one-way gates?), and I would have liked if the ending cutscene resulted in you landing on a reset version of the original torus to play again (to complete the loop) but these are not really criticisms - it’s a very impressive game that you should all be very proud of!