You can use the arrow keys to move too, Q and D are keys used with AZERTY keyboards and we forgot that it's not the same in other countries, this will make it a little easier !
And don't worry, we know reaaaaally well Celeste but the objective wasn't to make a common platformer controller, we'll improve the game but the constant jump Doodle Jump-like was the essence of our idea and our key reference for this. ^^