USE FULL SCREEN CONTROLS- -SPACE TO START NEW SIMULATION -CLICK AND DRAG TO MOVE VIEW PORT AROUND -SCROLL TO ZOOM IN/OUT -I TO TRACK OBJECTS, J AND L TO SWITCH BETWEEN THEM -F TO TOGGLE FORCE VISIBILITY -W,A,D TO CONTROL SPACE CRAFT -K TO STOP SCREEN REFRESH
-ADDED CONTROLLABLE PLAYER -MADE COLLISIONS MERGE TWO PLANETS -ADDED MOVABLE VEIWPORT -MOVED EVERYTHING INTO A SINGLE SPRITE -FIXED PEN RENDERING, NO MORE PLANETS FLICKERING -FIXED ALL PLANETS HAVING SAME INERTIA -USES STOCK SCRATCH TRIGONOMETRY - INACCURATE -USES EULER'S METHODS - INACCURATE SIMULATION
