"A Very Hard Game" is a game made by Nick Girardo for the GameTank. The source is available here. It's inspired by an old flash game Worlds Hardest Game.
The music was written by Blackfish and is available under the license CC BY-SA. Clyde Shaffer (the designer of the GameTank) was a tremendous help during development. I'd like to thank as well the many people who playtested this game during development, especially darthbeep whose feedback was particularly helpful.
"A Very Hard Game" can be purchased in cartridge format on the GameTank store. It is on a combined cartrige along with Clyde Shaffer's Cubicle Knight.