cut down frame 10 and 11 on running behavior.
use request animation frame for smooth movement.
change character movement to pseudo motion.
trim unused bg img.
add fog effect.
issue#1 : parabola 30 frame, sometimes fps drop from ~60 to ~30
wrap main logic to Main namespace;
add riding functionality.
Fix and change
return jump frame to 10
reduce angle to 171
fix ride bug direction
fix fog direction
better jump animation