Sorry it took so long! Key rebinding functionality has finally been added. This also includes the ability to choose between toggle or hold for ADS (and same for crouch and sprint.)
Additionally, some changes have been made to the game mechanics. You will now have to defeat a sufficient amount of enemies before you can move to another zone within the city (How many? Who knows! Easier to just kill them all!). ;)
This will greatly reduce the compulsion to "train" enemies. Fortunately I've also added huge upgrades to weapons and ammo. So you will have everything you need to destroy every enemy immediately on sight! (This will be more fun anyway).
I really hope this improves the experience for everyone. If anyone notices any problems with this update please let me know.
Chaz - Lead Developer