Hi LazyAnt Thanks for the screenshot and comment. we have thankfully encounter this bug too, it seems to be an issue with unity web player. To solve the issue we recommend playing the game in full screen.
The only testing we had was 1920x1080 resolution so I believe it's a bug with that. I'm very sorry to hear that you're experiencing this issue. The only other thing I can recommend is downloading the windows build of the game and running it that way. But if it's too much hassle or you don't feel comfortable running .exe files on your computer that's completely reasonable. if you do decide to run the windows version of the game please let us know how it goes. If not we still really appreciate you taking the time to checkout our game :D.