Press Space, W, the Up Arrow, or left click to go up. Don't do that to not go up. Your hitbox is much smaller than it looks, so if you get hit that's a genuine skill issue. Breaks in Turbo Mode, possibly in Turbowarp too.
A game I made to distract myself from making an actual game in Bevy, an actual game engine. This is basically just the wave gamemode from Geometry Dash, with asteroids as obstacles instead of literally anything else. If my friends pester me enough, an update may come.