Glitch or event?
Make your way to the space map and open up the shift menu. Press down to equip the bike and you will wake up in your room, but your bike will be equipped. (Usually if you were to unequip your space suit while in space, you would just wake up.) After around two to three seconds of riding around your room Urotsuki starts rotating around at an insane speed, and the tiles in your room will be changed into a very glitchy mess, with a background that reminds me of the toy world's background. The screen will also be flashing different colors, and you will wake up after a few seconds. I have not seen this event (or glitch) recorded on the wiki, so please tell me if this is nothing new. Thanks!
WARNING: after performing this glitch, the arrow keys would not work whenever I launched yume 2kki. perform at your own risk.
Edit: I found a fix. If this happens just reset your pc. Don't worry, nothing happens to your save file (or atleast nothing happened to mine.)