Monsters will appear from the white whole after you select a weapon from the right panel and put it on the map, going toward black whole.
There are three kinds of weapon: light machine gun, heavy machine gun and cannon. And a kind of roadblock. They are regarded as "towers".
Firstly should build some walls of roadblocks to limit monster's route. Arrange towers's layout to make good defense effect.
Weapons shoot at monsters automatically in their valid range.
Can replace roadblocks with weapons, or replace a weapon to another kind.
Use Hammer to remove buildings and harf amount of the price will be returned.
Click the blank area of the right panel or right button of the mouse to cancel the building mode into normal mode.
click a monster will concentrate fire on it.
"Money" is used to buy weapons and roadbocks, and will be increased when a monster is killed.
"Life" will be decreased when a monster reach the destination.