In the year 21XX, the Li’s field (李氏力場) becomes reality, in a form of a tower defence system. The system seeks to weaken, if not totally destroy, incoming typhoons into Hong Kong. Li’s enterprise has appointed Player to control the typhoon defence system for Li. The game genre are strategy and tower defence game.
ouch... looks like all variables miss the keyword
this.
before them, thus making all of them global. need some serious clean up