Hmm that's something new. Could you please tell us if your Windows 64 or 32? Can you please update your drivers, Java\DirectX\Graphical drivers.
Please write us if anything will help.
I'm sorry it's really hard to understand what cause such a bug. We still don't have a clue what it might be. Some computers just don't want to play our game well. I hope you will be able to refund the game. Please do so, don't torture yourself. There are plenty of let's play videos on YouTube you can watch :)
For the next game we bought another engine. Stable and with great support with a big portfolio. I hope our next game will be much more stable.