As the surface of your planet being ruined by your specie, you put on the jet armor and embark on the journey to the upper world, the place of prosperity, being known as "GEMcloud".
Since the resources on this planet has run out, GEMcloud began falling gems and crystals down to the crust for no reasons, the stones once symbolized flourish. However, troopers and monsters are also released to protect the realm from invaders.

Panels on the right side:

SCORE – The amount of your current points. Once it reaches 1500, you’ll win the game.
TIME – Nothing need to be explained about it.
SHIELD (costs 266 points) – You can use 266 points to purchase a shield, which adds a heart(HP) to you.
PAUSE – Suspend the game if you need to.
The translucent icon of GEMcloud – It records the progress of the game. As your score runs up to 1500, the icon will become opaque gradually.