Minor update

I’m sorry, guys. I’ve updated again in a hurry. I’m gradually debugging the gamepad function. During the game, after disabling auto - casting, I found it very hard to cast skills by pressing the number keys in the middle of a horde of zombies. It’s also not easy to cast skills after changing the keys. So I took it upon myself to make use of the left and right mouse buttons for casting. I hope you’ll like this change.

The left mouse button and the right mouse button can cast one selected skill each.

The mouse wheel can change the setting of the left mouse button.

Alt + mouse wheel can change the setting of the right mouse button.