20000LSD

Basically it's a FPS runner\platformer. But it has 1 unique feature - platforms scales by the speed of the player. It creates pretty interesting, trippy  visuals and more over it's directly affects gameplay. I found it kinda cool.  I made this game solo using only Unity inbox stuff in under 7 or 8 hours, so don't be too picky.

The end of the game is at 20 000 units from start. Try reach it and write down in the comments what you found.

Try google Lorentz–FitzGerald contraction.