I am using a laptop with touchpad so the controls were very tough to use the keyboard and mouse combination. Opening up the wasd would be helpful in my case. But its way better than what I came up with, keep it up!
I used to play lots of browser game son a Chromebook, i know what that's like.
I usually implement WASD pretty early on, but I didn't end up having time to do such a simple thing unfortunately. At least Gdevelop has any default controls for the behavior for movement.