Added a new system for shortcuts to allow the player to do some of the basic functions in game by pressing a key instead. The current release maps all the main buttons, such as Pause/Resume, Speed control, Rushing and building new towers. The shortcuts can be remapped to different keys by opening the settings window and clicking the Shortcuts tab.
In addition to the shortcuts, I also added a minor feature for placing multiple towers by holding down shift while placing. This will allow you to move the tower around without dragging and will allow you to build by clicking the left mouse button and will setup a new placement of the same tower type so you can quickly plan/build many towers.