This is probably a brand new PPG concept. You might need a second player.
Level 1: Happy Green Hills - Finished
Level 2: Candy Land - Not Finished
Level 3: ??
Level 4: ??
Level 5: ??
Level 6: ??
Level 7: ??
Level 8: ??
Level 9: ??
If you want to test, just tell me and I'll PM you the link.