Controls
movement (arrow keys)
- left/right to strafe, up/down to move forward/back
- space to jump
camera angle (wasd)
- a/d turn left/right, w/s tilt up/down
- q/e roll, i/k j/l orbit
trackpad: scroll to orbit, pinch to zoom
mouse: click+drag orbit, right-click+drag move
touch: one finger orbit, two finger pinch/pan