1. I really liked how the levels taught you the basics of the game and ramped up in challenge using what you have learned from previous levels. However, the controls if they weren't explained to me, might have been a little confusing. I think it's mostly because of the limited sprites but it was hard to tell which way the plane was facing sometimes.
2. The game gave me a relaxing chill kind of feeling. It was nice that the controls felt light and lofty.