Glad you're enjoying it!
Getting a native Linux version going is still on our development list but Android has just been taking all of our time. Still going to happen at some point though.
A) Yeah sounds like a WINE issue. I'm surprised you even got it to work with WINE, quite a few people were saying they weren't able to.
B) I believe the default skip key should be ctrl.
C) This was an issue with Cro's AI where she would decide what to do before CJ refills his MP. She has a bit where she wont attack CJ if he has no MP, but if Aine is KO'd then she won't do anything. The issue was that CJ's MP refill was outside of this loop instead of inside, so Cro would just continue deciding to do nothing forever. It's fixed now in the newest dev build.