Or, you could do what I do, Daikaju. I find that adding special tower effects costs a lot and is an inneffective strategy in the later levels. I prefer an organized maze of pure element 'shrooms.
Really good, but now that I've beaten it, there's one more bug I feel obligated t point out. In the falling blocks section, One can simply stand as far to the right as possible and not be hit, the blocks simply don't hit there. At any rate, 5/5.
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 "Factory Balls 2")
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