Crystal Madness

From the readme file:

Crystal Madness is both a puzzle and an action game. You are an insane elf, and your ultimate goal in life is to collect as many crystals as possible. In ordered to collect these crystals and fullfill your goal, you must face many hardships. These include not only the puzzles and items found in them, but monsters dedicated to your demise. Enough said.

.. here are the rules:

In order to pass each level, you must collect all the crystals. When you have collected the last crystal on each level, then you will be teleported to the next level.

In my opinion this game isn't really great. The graphics aren't really good and neither is the gameplay.