Thanks for trying it out! You can actually use the numpad for rotating the camera: numpad 8, 4, 5, 6 for camera, and 1, 2, 3 for attacks (I assigned those more for debugging), but I guess it wouldn't hurt to add IJKL too (as some people use keyboards that have no numpad).
I had been thinking about that, regarding charged attacks being too powerful. I'm hoping more variety in enemy types will offset that (a ranged attacker would easily disrupt your charging). We'll see as I implement more stuff in the future.