This tower defence game is based on the "tower defence" of warcraft3 and the "turret defence" of starcraft. The idea is basically to defend your castle from monsters (denoted by black dots and spawn every 20secs) by building element towers around the map.
Element towers (except storm, not sure about the flower one though cos never had a chance to buy it..) can be upgraded which then deal more damage and over a longer range. Each element is unique and have different upgrade bonus and cost.
When a monster gets into the castle, 1 citizen will die. You lose the game when all 10 citizens are killed.
My best score is 72... try beating that!
Play Tower Defence!