[MrRubix]

Juggling makes any of these modes easy -- there are no Flyers (i.e. things that go OVER your towers) in this game and so juggling is all you need, and you've got yourself an impenetrable strategy as long as you time your wave releases right (typically you want to release new waves when the fastest wave out there currently is approaching the start of the level).

Also beat Z-Rox in less than an hour.