This game is a combination of a tower defense and clicker game!

You'll start with a castle and monster come from all directions and you have to click on em, like those bug squisher game, to kill them. Eventually you will get enough money to build tower and you can put towers that automatically attack monsters around them and you can also upgrade your main base by giving it new weapons or making your clicks stronger or increasing the max hit points.

You can also sped money on repairs in case one of your towers or your main base is damaged. There will be difficulty options; on easy, destroyed towers will simply appear as "broken". It can't attack, but you can repair it for fairly cheap price. But on harder difficulties, when a tower is destroyed you going to have to buy another one. Of course enemy waves will get stronger and stronger over time, the goal is to see how long you can survive.

You'll get a high score based on:

-Time Survived

-Monsters Killed

-Base worth (the value of all your base+towers combined)

http://www.misterhonk.de/blog/20375/kingdom-rush-tower-defence-flash-game/