I wager most of the ghosts you're missing are from VS. mode. I do believe the clover effect may be bugged, so expect another patch sometime soon. The cheese item should appear in other mazes after you collect it the first time in the cheese maze, though this may be another bug. There is a maximum maze size, and there are failsafes in place in the event that a maze can't generate properly. I'll continue to work on the balancing since I want the game to continue being fun even at high rounds like that. Thank you for all your feedback!