To beat each of the stages in this game, you will need to destroy all of the blocks. Do this and then eventually you will be forced to take out and destroy the core. Destroy the core and you'll instantly move on to the next core. Though, keep in mind destroying the core too soon isn't always the best idea - this sort of approach can potentially leave you without enough money accumulated to purchase upgrades. A notification in the top right corner of the screen will tell you what you need to do yet to complete the current stage. Also along the top at the left side of the screen will be your current score. Down in the bottom left is your current amount of hit points and lives, and off in the bottom right is how much money you have earned. Control yourself by using the left and right arrow keys, or A and D to move left and right, respectively. Aim the cursor by using your mouse. 1, 2, 3, 4, 5, and 6 will allow you to pick your weapon, provided you have them all and have ammo available. Up along the top is a big health bar spanning all of the way from the left to the right - this represents the HP of the core - you'll need to drain this all of the way to move on to the next level in this addictive and highly challenging game.