Fahrenheit 3000 was a platform game released by Softstone Ltd for the ZX Spectrum. It was later re-released by the budget label Firebird (aka Telecomsoft). The game had 64 screens each requiring almost pixel perfect movement/jumping.
From the cassette inlay: The Core Temperature has reached 3000F. Meltdown Imminent. Shutdown the reactor. 64 amazing screens - Solve them and win a Mystery Prize.