Hold down shift and press green flag(Turbo mode). Use arrow keys to move and go to wherever you want the light to emanate from. Press space to accept and generate random objects and shadows! The higher resolution the shadow caster, the better quality the shadow will be; that is why the helicopter's shadow is not that great. Also note that opaque outlines(Be it white, black, or any other color) also ruin the effect(Which the helicopter also has... The helicopter is pretty much here to show you what it cant do).
This is just a Proof of concept. I'm still working on a practical version that will be much more efficient, faster, better-looking, and overall just.... better... v1.1 -Day of release - Added multiple sprites and shapes to cast shadows! Added option to turn this on and off. v1.2 -Day of release - Made it 100x faster, but it's still mind numbingly slow.... D: