Nicely done! I also went for a "Upgrade and Launch as far as you can" style of game, though I have to admit the art for your game looks a lot nicer. I thought the sounds were pleasant to listen to and it felt satisfying hearing a bunch of pickup sounds as you speed through a lot of collectibles.
I will say that the hang glider is a bit too powerful at staying airborne in my opinion. It made the first run where I got it last *way* longer than the previous runs, and I felt like the only reason that run stopped was cause I got tired of using it after a few minutes.
Aside from that, I enjoyed the game. Good job!