Loved ship building!
Even though it was annoying not getting the part I want and when it shows up its for the wrong side :( I guess there are not that many parts otherwise..
I might suggest you add extra storage slot where I can buy and put one part in advance and attach to the ship latter.
And since the score is based on height you could use data received from LootLocker and display them in-game so I could sometimes see the names of people I'm about to beat.