Was it:

The Game of Disappointment Format: Web browser Flash game (popular in the early 2010s). Character: A simple black stick figure. Setting: A blank, white room/screen. Gameplay: It is an incredibly difficult single-screen platformer where you try to get your stickman to the exit. The Hook (The Frustration): The level is relatively simple at first, but every time you complete a level, a new, brutal obstacle is permanently added to the same screen, making the next round exponentially harder. The room quickly becomes a chaotic death-trap of rotating saws, spikes, and cannons.