Very nice looking game. I'm going to finish it. A bit easy for me, but really cool concept.
Thanks a lot. If you find the levels to easy, wait for levels 3xJ and 3xbR :) those are quite difficult imo.
My best score is 4XR. Is this far from it ?
4xR is the 16th level, so you still have 18 levels ahead of you :)
3xJ is the 21st level, 3xbR is the 33rd.
Ok nice, I'll try latter ;)