You're running through a treacherous maze where you have to collect as many crystals as possible. Climb ladders and jump on platforms to get launched. Yellow platforms are safe, and blue platforms, too: they have a conveyor belt function. The spike platforms are dangerous: they'll perforate you! The purple platforms are risky, too, as they collapse. The red platforms can be useful and treacherous at the same time: they open, making you fall through.
Use the arrow keys / WASD and the spacebar to play this game.