Senilescape (Xaychru04)
"You are an old gangster, locked up in a prison for 42 years, and you suddenly find a way to get out of the cell. Your goal is to escape and stay beneath the surface so you don't get killed." - Author's Description
Why play it? Senilescape is a quite difficult runner-platformer. It is technically possible to finish it in under 2 minutes, but I wouldn't count on it. You need to learn the enemies' shooting patterns, and it's usually done by getting brutally killed a fair number of times. - Luca
Play it here (Browser)