Interesting...
What version of the game are you using? (MacOS or Win)
It's the only report related to your problem I've received. I wouldn't know what the problem is.
I can think about two solutions for you, right now.
1) I'll be fixing some minor bugs for the public release. This week I'll be updating the game. Please wait until the release and see if the new build works for you.
2) I'm preparing a Web Public release I'll be launching on Newgrounds. Please wait until I upload this release so you can try the game there. This build release will have not that cool graphics but will be able to show the game mechanics in general (Including the public build leads).
So if you like the idea, I can notify you about the updates by replying this conversation.