Submerged

Try to go deep and find The Treasure of The Depth!

Gather resources and spend them later on to get awesome upgrades (and friends!)

Just watch your oxygen resource, as you have to go back to the surface in order to refill it. (don't bother going up yourself; the game will handle it for you, and you will keep all your resources ^^)

Have fun! We hope you can unlock the treasure! You'll like the reward :P