Cave Diver is a game for the Playdate that is based on the widely known board game Diamant. The name of the game is to find as many diamonds in the cave as you can, but be careful! Traps are in the cave as well, getting two of any trap will end your game and you’ll lose all your diamonds. How many diamonds can you make it out with?
FWIW, the description at the bottom says that updated art is coming soon, so the dev is aware. They are probably just placeholders.