Oh no! That's not the intended experience for sure. I'll try to reproduce it - in the meantime, it might help to refresh the page. Thanks for trying the game, anyway!
EDIT: it looks like this is a browser-specific issue. Firefox and Safari work, Chrome doesn't in many cases. I know how to fix it, but the GMTK jam doesn't allow updating or linking to an updated version, so that will wait until the voting period is over. In the meantime, you can use Firefox!