Finally! I unlocked the good ending. Wow, that was so hard. But the game wake up my competitive spirit. I try and try until i make it. Hope to see a more complex version in a future, So like CS you could make more endings, ost, characters and other features (like the booster in CS) Ah! i forgot to metion. If you have exactly 20 hearts the fall substract all of it except one BUT! the bad ending still trigger it and you can't move or do anything.
Someone already told that here in the comments. Good luck. Again thanks for sharing.