I dig the music, I've had the title track playing for several minutes in the background while I jot this down!
The level designs are fun and quirky. The artwork is great. I had a lot of fun floating around and exploring everything on my quest for the ship parts.
It wasn't immediately apparent to me where the exits from inside buildings were. My brain registered the giant black doorway silhouette as background art, so I kept going back to the level start to look for the exit. It totally clicked once I figured it out, but maybe there's an opportunity to call out the exits visually a bit more.