When I clicked on the xylophone I couldn't leave it and had to reboot the game (idk if this is also an issue on the download version)
Same goes for the puzzle in room two
Also idk where else to put this but if you go into the Goon Lyfe room then you have to redo all the puzzles when you exit
patched!
the back button was escape, but I noticed escape also removes mouse capture on firefox so I just added an onscreen back button too!