Manic Miner is a faithful remake of the old school classic of the same name originally written for the ZX Spectrum by Matthew Smith and released by Bug-Byte in 1983. It is the first game in the Miner Willy series and among the pioneers of the platform game genre. The original game itself was inspired by the Atari 800 game Miner 2049er.
Press enter to start. Use the arrow keys to move. Press 'd' to jump. In each of the twenty caverns are several flashing keys, which the player must collect before Willy's oxygen supply runs out. Once you have collected the keys in one cavern, you must then go to the now-flashing portal, which will take them to the next cavern.