Almost Perfect
Great Game, and I still play it from time to time. The only problem is that the air Xeno's of level 6 get too strong at level 79 and above.
The best I have been able to do is to get to level 86, where that batch of Air Xeno's are too strong, and I have no extra health left.
I think a slight adjustment in Air Tower Power (Make Stronger) or Air Xeno Health Lower by a bit would make the game more enjoyable. Do not make it easy, but the game should still be able to be defeated if enough time and effort.
Has anyone ever made it higher than level 86?