Controls:

• Left mouse button to place object
  • Hold "X" while clicking to delete a placed object
  • Hold "C" while clicking to snap the placement to the center of the face
• Right mouse button to rotate camera
• Mouse scroll wheel zooms
• "A" snap rotates the camera left 22.5°
• "D" snap rotates the camera right 22.5°
• "W" snap rotates the camera up 22.5°
• "S" snap rotates the camera down 22.5°
• "Q" decreases the "trigger" time by 0.25 seconds
• "E" increases the "trigger" time by 0.25 seconds
• "Space" toggles play/pause of the simulation
• "Backspace" deletes the last placed object
• "Escape" restarts the level