I think this game is great, but I honestly could not get any ending except 2 :( I don't know if it's just me, but the mini-game is incredibly difficult to get very far in, and I noticed it would react to something "hitting" me even if nothing was touching my little ship at all. Not at all hating on this game, but just wanted to share since it frustrated me to the point of closing it for now.
Ah I am so sorry! It is based on the player's skill level (Some would beat it their first or second try, while others take 20+ tries to beat it.) But there is one ending you can get where the mini game doesn't activate and that is ending 3/4 :3 Either way very sorry for the rage quit I did make the mini game a little bit stress inducing since that is in the spirit of the Iron Lung ;3;