I've been playing this game now and generally enjoy it, but one thing that I cannot figure out and that bugs me is when does the game save my progress? I was up to the forth stage and had to quit. I assumed that the stages I beat would be available to me during the next game, but when I started playing again, only the first 2 stages were open! I've worked my way back up to the 4th stage again and had to exit out and the same thing, back on stage 2! Anyone have any advice please?