Your objective is to destroy the enemy's base. You can upgrade your lives, range, speed and damage. The game level shows the level of domination. EXP shows the ability points that you can use to create or upgrade a unit. Money is necessary for training units in battle. Use your units wisely! You will lose if your base is destroyed, or if your unit is zero.
Use the left and right arrow keys or A and D to scroll the game. You can also move your cursor to the edge of the game screen. Press Z/Y, X or C to fast scroll to the left, center or right edge of the battlefield. Press P to pause the game, and press it again to restart.