For some reason it didn't run very well. I'm not sure how much you would have been able to do about it, tho. Loved the art style, but one thing I didn't like as much was the controls. I'm not familiar with gdevelop, but unity has a way to get both WASD and arrow keymovement at the same time. Might be something to look into. The way to do it in Unity is using Input.GetAxisRaw(string axisName), which returns a number between -1 and 1 depending on the input gathered. Then you can use that make a vector that will move the player. Hope this helps! :)