Jumpin' Jupiter (14th April 2020) (Spectrum 48K/128K) A fairly standard platform game in classic linear style with the quest items being cups of tea. Levels, accessed serially, are not difficult.
Manic Miner (11th August 1983) (Spectrum 48K) One of the very first platform games, you control Miner Willy in his quest to collect the items from each screen.