This game was available on various consoles but so far I've only played the NES version.

There are also some PC games which are clones of it such as Diamond Caves 3.

Anyway, the object of the game is pretty simple, collect the jewels and avoid getting hit by boulders or monsters in the process.

Here's a video:

Simple, yet very fun... looking XD

I have to say I've never played it, but it looks adictive

Classic.