You must design a heat sink to protect an overworked CPU in a dusty environment. As time passes, dust will collect on the components and the CPU will run hotter and hotter. How long can your design function until it is completely clogged with dust? This game is freely available and can be played in-browser on its homepage.
Screenshots of the game Heat Sink - title screen, designing the heatsink, and then seeing how long it lasts.