I feel like I'm missing something. At a certain point the enemy just comes down about 20 seconds after I start, shoot threw all of the stuff I've built, blow up my power and then my base leaving everything else just hanging out like shields, barriers and the like.
The main game was disappointingly easy. Assault, wait for revenge wave, withdraw and whittle them down, repeat. The same strategy for pretty much every level and only took castle damage on the last one. The cave challenges are at least actually challenging.
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