Manic Miner by MinionSoft is a retro platformer game for PICO-8. It’s a remake of the classic ZX Spectrum game ‘Manic Miner’ by Matthew Smith.
In this game, you play as a small guy with a setting and layout of different levels. You need to collect the keys/items in order to unlock the gate. These keys/items are scattered across the whole level. You have to jump, avoid enemies, lead yourself through some traps and finally collect all the keys. Once you collect them all, you will pass through the gate to the next level.