Thanks for your feedback! Yeah I should have added something cool if you jump in the pit a lot lol, missed opportunity for sure.
I definitely should have tried optimizing a bit better (I only tried on mine & my wife's PCs, hers is middling specs but of course as Pangbot mentioned incremental-enjoyers are less likely to have good specs hah) -- makes total sense. I think the vibration issue you mentioned might actually be tied to frame rate because I actually had no idea it was a thing (but the physics of holding the cube is like the only thing that is tied to the frame rate), that is really good to keep in mind going forward. I need to get a laptop or something to test games on in future! If you don't mind me asking, what are your specs (mostly CPU / GPU / RAM)?
As for the tutorial shop thing... yeah there is actually an arrow that you can JUST BARELY see above the shop, but I accidentally made it be the tiny arrow and not high enough (it was supposed to be like the big arrow above the rig in universe 2) hah, whoops! Thanks for bringing it to my attention. And the store being a bit too complex at first, makes total sense tbh.
Thanks very much for your feedback! :D