I like the concept a lot, but I don't really like the controls. They seem kind of finicky and oversensitive, though I might just not be used to them. Using the mouse to control angle+thrust would be neat, but also make the game a lot easier. Maybe to maintain some difficulty you'd make the player click away from themselves and aim the balloon/thrust instead of just putting the mouse where they want to go.
Walls/floor friction making you lose your velocity beyond simply bouncing off them felt kind of bad, I'd expect to be able to slide along them.
I could maybe see this being one of those low-budget streamer rage-bait games if you wanted to push it in that direction. Like Jump King, etc.