All upgrades add money.
OONi Battle takes you to the world of OONi. Pick one of the three available tribes and battle your way through the land to destroy the Shadow Ghost.
This is a turn-based strategy battle game. You only need to use the mouse. You'll have to face enemies one by one, and if you lose you will have to start all over again. Hit them hard to get more coins, which will be needed if you want to get to level 10.