Fun game until recent consistent crashing – A Mental Mouse Review

I've had this app since it came out and never had any problems with it starting up. I updated it a few months back and didn't play it for a while but now when I try to open the app it crashes soon after the title appears. I don't know what would have caused this, but a possible fix would be highly appreciated. Running on an iPod Touch 4th generation with iOS 4.1. Thanks.
Review by Uncle Challs on A Mental Mouse.