Hi JMP, first of all I'm so sorry I didn't see your message until now! I had quite a few notifications and somehow lost this in the mix. This may be a bug with the Linux version - I'm sorry about that. The good news is that I've completely rewritten the game in Gamemaker and I hope that such issues will be resolved. I will be posting an update very soon - once again, sorry about the issue - that would be frustrating!