Hey, i hope this is ok here.
I use a dvorak keyboard, so playing not tetris was a bit tricky. I've managed to find and change the rotation keys to q and j by perusing the .lua files. But for others, in the future, maybe a customisable key layout menu thing would be good. Not tetris is one thing, but Mari0 will probably be impossible for me!
Anyway, thanks for the awesome games. :)