I'll begin with criticisms, then gush about everything I loved about this.
First of all, making the player return to an earlier "decay level" after failure feels awful. I already beat that level, and if it took a long time to beat, it just feels like a slap in the face to someone trying to progress. Bad design.
Entering the ship without enough speed can result in you not having enough momentum to reach the floor. That also feels really crummy, especially when trying to move as fast as possible. Now I gotta watch my guy fall down, then accelerate again, and oops! I missed it again.
Tangentially related, people have suggested a way to jump while inside the ship. Absolutely a good suggestion.
On a different note: The graphics are amazing. The music is nice. The player movement felt good. I appreciate the sound effects when certain objects break. I wish every object had its own SFX.
I haven't seen anybody make it this far, so I thought I'd brag:
I honestly don't know if beating this level is humanly possible, but it felt pretty good to make it this close to decay 0.
All around, great game.