The whole edit and velocity idea seems interesting.
Perhaps a different idea:
When you fire the gun, it makes a 'ghost-like' circle infront of you, where you use brick controls to move and rotate it (small rotations, with 7,9,1,3 and super shift combos rotating on different axis), once you press the plant brick key, it cannot move, but is still ghosted, instead, the brick shifting keys will now adjust the velocity. Once planted, it becomes active, and has a green color, and will now give people a velocity.
