I like the idea of gathering all the scraps to upgrade your ship. The hitbox of your ship however feels very off, I would give the player a bit more leeway with it size. Because sometimes I felt that I was in the clear and then I died because a small fraction of the ship clipped a collider, same goes for the water.
tldr:
Good: Concept and initial mechanic.
Bad: Readability of the hitbox and environment.