itch.io

Did you exit Koby's Adventure and then re-enter later and that's when the bug happened? I've found that it sometimes bugs out if you do that and I should be able to fix that.
For now though, you should be able to scroll far down on the sidebar and find the button to reset Koby's Adventure. At least that way you'll still be able to play it  (Actually I think in the public version there is no Koby reset button so you'd have to start a new run in order to get the Koby game to work again)