1) Description is lacking, you should have elaborate more instead of saying "Don't let tower destroy".
2) Scripting/Triggering is full of memory leak and ineffective, it could cause heavy lag after playing it for a period of time.
3) Hotkey clash, the terrain was blank (It was unacceptable for such a game genre to have a blank terrain) and it was using ordinary ability as well.
Sorry to said this, but it was 1/5 (Unacceptable). Please read more tutorial about mapping and try to understand it.