This was something I was working on when dabbling with Pico-8 and learning programming & game development years ago

Objective: Find as many gems as you can in a room

Smash vases to find the gems
You need at least half of the gems in a room to get the key to proceed to the next room
Beware, some vases contain explosives
Weigh your options: If you try to collect every gem you might not live to make it to the next room

Dungeon Dino