Game: Bloodonaut

In a distant future, nanorobots could swim inside the human body. Scientists and the government created remote control for these robots and allowed single, unemployed, overweight young men to guide them to their goal: remove clots from even fatter people's arteries. You're a nanorobot navigating inside an artery against the flow. From time to time the heart beats and you have to cling to the wall so you don't get pushed by the flow. Get all the way to the top! Watch out for fat incrusted arteries: you can't hold on to them!