Complete Level 1 without any deaths.
Complete Level 2 without any deaths.
Complete Level 3 without any deaths.
Complete Level 4 without any deaths.
Complete Level 5 without any deaths.
Complete Level 6 without any deaths.
Complete Level 7 without any deaths.
Complete Level 8 without any deaths.
Complete Level 9 without any deaths.
Complete Level 10 without any deaths.
Complete Level 11 without any deaths.
Complete levels 1-3.
Complete levels 4-7.
Complete levels 8-10.
Complete level 11.
Finish levels 1-6 with a single set of lives.
Finish levels 1-8 with a single set of lives.
Finish the entire game with a single set of lives.