The mouse cursor won't move. In the support section there is a thread about it but it doesn't really help, it just suggests some awkward method with no guarantee that it will work (didn't for me). Funny how none of the comments mention this. The game is good, i have a physical copy and i liked it a lot, but it doesn't work on Win7 64bit. I was hoping getting it from here would solve the problem, but for now it's 6$ down the drain to gog.
