Holy smokes, this is fun. I wanted to keep playing after finishing the upgrade tree. I especially like the contrast between how it feels during your first, fifth, and like tenth run. There is such a noticeable difference in flight control, power, and resource collection. The added dialogues between characters was a nice way to breakup the gameplay. It didn't get in the way or overstay its welcome.
Inspiring work, and I look forward to any future development!