All 20 screens of Matthew Smith‘s ground-breaking 1983 ZX Spectrum platform game, Manic Miner!
Smith created an almost perfect game, which often requires pixel perfect jumping to complete. You play as Miner Willy, a characterful little feller, trying to make his way through increasingly difficult screens, each with their own name and style.
Many retro gaming fans see Manic Miner as one of the best platform games of all time, and I wouldn’t argue with that. It was also one of the first ever video games to feature a continuous soundtrack, which was remarkable considering that the ZX Spectrum was not known for its sound capabilities.
Manic Miner was first published by Bug-Byte, and later re-released by Software Projects. It also spawned a famous sequel too – Jet Set Willy – although more about that later. In fact, Manic Miner was so successful that it was also converted to many other home video game systems, including the BBC Model B, Amstrad CPC, MSX and Commodore 64 (among many others). The Spectrum version is still the best though, in my opinion.
See also: 10 Best Manic Miner Conversions
More: Manic Miner on Wikipedia