Basic 2D simulation of grabbing a snowman's nose, using "Phase 2" physics (as described in the Physics README).
Keyboard Controls:
IJKL (like WASD) to move the pink block (which represents a hand)
Left Shift to grip (must be gripped to affect object). Pink block becomes more transparent on grip.
O & P to rotate CCW & CW (must be gripped to affect object)
To test conservation of velocity / rotation on release, hold the direction or rotation key down while releasing teh grip
WASD and mouse also move view as usual.
Gravity is artificially low, to make behaviour on release easier to ovbserve.