yeah it takes some time to get used to - thought that it will be the part of the challenge, but I'm considering to switch turret control to mouse (shooting as well) - will probably release it later this weekend ;)
I'm not sure about the mouse solution as it makes this game... way easier and so much different than this version - I'll re-think the core mechanics and change maybe some rules (less frequent shoots from enemies, but maybe multiple ones? Not sure yet).
In the meantime I won't release the mouse version as I really don't like it :/