GDevelop hmm... might be the first time I hear of this particular app! Interesting. Seems you can develop interesting things with this, even if the start menu froze a bit for me before it loaded (looked like it had bugged out entirely, and the sounds kept playing even though the text didn't change). Once you start though: not bad!
I wish there was a way to tilt the bike to better balance it when you're on a jump, but at the same time the lack of control does add to the challenge. If it stays this way though, it'd be good with at least checkpoints thorough the level, for example when you switch color, so you don't need to start from the start each time. It's a looong way after all...
Also: music's pretty loud compared to the sound effects! Overall a fun game, but a little more balancing would be good. Tilt + checkpoints would be perfect for fun, but checkpoints only for challenge. I like the simplistic style, even if some bits (like the clouds) seem a bit oddly placed. Keep up the good work! Love bike games like these btw, just used to a bit easier control.