Going up and down is weird because you don't control it, it just snaps you to the angle.
Viewing post in Low-Poly Flight simulator beta v0.2 jam comments
Thanks for the feedback. Due to the time constraints, I could not make it as good as expected. Try playing the new version here
https://pmcoder.itch.io/low-poly-flight-simulator-beta-v03
I have fixed that issue in this version