Shift-Click : Multi-Select
B : Spawn Brick
N : Spawn Ball
M : Spawn Wedge
F : Spin (Yaw)
Shift+F : Flip (Pitch)
Alt+F / G : Rotate Side-to-Side (Roll)
Ctrl+D : Duplicate Selection
Ctrl+Z : Undo
Ctrl+Y : Redo
Del : Delete Selection
Right-Click + WASD : Fly