Played it for 20 minutes or so. Made it to the third appearance of bounce mushrooms, but once moving spikes started being a thing my progress/frustration ratio got too high.
I had a lot of trouble aiming the balloon. Tapping the arrow keys seems like it would often rotate the balloon two steps, and then I'd have to correct, which risked overshooting again. This may just be a "me" problem.
It also bothered me how quickly you lose horizontal momentum.
Something feels really off about the movement. Like sometimes it felt like giving the same amount of thrust at the same angle gave very different changes in velocity. Maybe I'm crazy.