Gonna post this here for anyone having the same issue!:
It turns out this bug is a result of there being an additional device plugged into the computer (a controller, tablet, or otherwise) while playing. The game isn't designed to work with a controller and bugs out with the additional input.
We're going to release a fix for this ASAP, but in the meantime if you're experiencing this issue you can try unplugging any controllers that may be attached to your computer before playing!