It´s indeed really hard to achive. It was first planned to make 5 levels (level 2 and 4 with two different paths), but I ran out of time because familiar issues during the jam. So I rised the difficult level.
Oh, and there´s a bug. Level 3 is the last level of the game, but instead of the "Game Complete" animated screen, it returns to level 2A (the crew rooms). Sorry!!