Instructions:

Press the escape key to quit.


This is a tower defense game. You can place towers and other objects 
(such as BOOMS!) to destroy the white cubes coming at you from the top
right hand corner. to place objects, put your mouse cursor where you
would like the objects to appear and press the corresponding key:

Spacebar:   Place a laser tower (can shoot anywhere on screen but only
one enemy at a time). costs 1,000 money units.

Left shift: Place a BOOM!, an object that will destroy any enemies in 
it's immediate radius. costs 50 money units.

Tab key: Place a MegaBOOM!, a much bigger version of the regular boom.
costs 200 money units.

Left ALT key: Place a BOOM!-Tower. Once you have purchased the tower, it
will create and automatically launch BOOM's without costing you any
money units. costs 7000 money units to initially build the tower.
