removed thumbs.db from data
Game over screen now uses relative units;resizable
Platform difficulty scales with time

As difficulty increases:
* Platforms uniformly fall faster
* Size of spawned platforms shrinks in size
* chance of spawners spawning platforms drops

Also:
* Floor drops at start of gameplay
* Platforms spawn and are spaced correctly
* 1 spawner will always fire, to ensure player can jump higher
* Platforms can be resized
* other stuff maybe...