Hi, everyone. Thanks for playing my game!
I am aware of a physics error, but I can't update the game until the voting period is over.
The only thing I can do is... Warn you about it lol
Apparently, it only happens in the browser version, and in the floating plataform between two mushrooms. (Which appear in one of the screenshots in the page)
Just jump out of the platform and try to not walk over it, or the character will get sticked to that plataform. If you already got in that state, then keep moving. The character will (very slowly) move away from the plataform.