Collect all coins in all levels in World 1
Complete all objectives in World 1
Collect all crystals in all levels in World 1
Complete all objectives in one level
Get 3 stars in all levels in World 1
Get 3 stars in one level
Finish half of the levels in World 1
Finish the last level in World 1
Complete all objectives in World 2
Collect all crystals in all levels in World 2
Collect all coins in all levels in World 2
Get 3 stars in all levels in World 2
Finish the last level in World 2