This game is published on kongregate already, so where is a point to publish agan. ( http://www.kongregate.com/games/thietface/canyon-defense )
PS: do you have the copy rights to publish the game ?
around 10 - 12 it is to easy
simple tactic: only small lasers and updates on it (each level decrease a laser tower price) + the shield on the wave begining - 8/9 level up (to protect the base before lasers destroy the main part of the wave).
 "Dawn of the Dragons"){kind=icon}
 "Roads of Rome"){kind=icon}
 "Canyon Defense"){kind=icon}
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