Looks like fun...

For whatever reason this app will not even begin to run on my Mid-2009 MacBook Pro (2.66Ghz Intel Core 2 Duo, 4GB DDR3 RAM). It has made me have to force shut down my laptop, (held down power button) then I deleted it and then reinstalled it but it just came up and said “Touchgrind BMX has quit unexpectedly.” I think it is an incompatibility issue with the GPUs on my laptop (NVidia GeForce 9400M, and NVidia GeForce 9600GT). Maybe I’ll try to download it again in a few months.

Redeagle2000 about Touchgrind BMX