hmm.. imo you should get new cards faster in the beginning. I have now played 40 (15 won :S), without gaining any. Would be nice motivativaoin if you gain 1 card each time you "leveled"
8,6x! :D
I only had one game left at 3, but luckily it was easy as hell (the one where you control a ball and have to avoid 3 jumping balls) :D Got a bit boring though