For some very obscure reason, I couldn't ever use the Arrow keys or WASD to move. The hero was stuck in place and I wondered if I was too dumb to understand how to move in the game, until I watched your gameplay video. This is strange as I used GDevelop a lot too, and I never ran into this (I'm on Mac, but that's never been an issue).
Great work for a 3 hours game, it feels complete and I would have loved to experience it firsthand, but that doesn't affect my rating in any way. Great game!