Chuckie Egg is a platforming game developed by A&F Software and released for the ZX Spectrum in 1983. The goal is to collect the eggs that are strewn around the various stages whilst avoiding the titular chuckies as well as the mother duck in later stages, before time runs out.
BenInSweden completes 5 loops of the game, after which the difficulty stops increasing, in record time.
Gameplay starts at 2 minutes in the encodes.