This game is amazing. Unfortunately I've had to delete it from itch as I downloaded it from Steam, but that changes nothing. This game is still amazing, as are all Far Few Giants games.
Actually looking at it myself I believe the fix is to simply upload an unzipped folder. Please do if you can.
At the moment I can play by downloading from a browser but no download options show up in the client. Can you look into this?
I love this game, my only complaint is on keyboard it is near-impossible to change directions. It's literally faster to put down the hoverboard, turn around, and get back on.