So I played around a bit with Shaun Spalding's arena shooter tutorial (GML), and wanted to use the WASD keys for the movement instead of the arrow keys. I then noticed that, when I press the WASD keys and the player is moving, the mouse pointer isn't moving at all, and while moving, I also cannot shoot (which happens by clicking the left mouse button). As soon as the player stops, the mouse pointer moves again and and I can shoot. As soon as the player moves, it's not working anymore. I searched on the web for a solution to this, but unfortunately couldn't find anything. I also tried to find a work-around, but shouldn't the WASD keys work just the same way as the arrow keys? Does someone else have the same issue? Could this be a bug?