I think the control scheme you have here is at the core of the design philosophy for the game. Using WASD or the arrow keys might make it snappier, but you'd probably be sacrificing necessary precision. I don't know if a controller is supported because I didn't try one, but I bet that's going to be the best compromise between ability to react and accuracy. Either way, it's good that you're putting so much thought into it, because that is certainly one of the most important parts of the game.
Viewing post in Destroyer of Destroyers jam comments
I agree, and I'm also planning how to add controller support in a good way. Currently I'm considering one joystick being for movement and the second one to move the camera slightly farther to either side. With the WASD controls they'd really just an alternative to the mouse, since you could use either. For now the plan is to make a list of different control schemes and an easy way to switch between them in-game, so I can quickly bring new ideas to life.