survival it's possible in this way: you have to do 4 towers full of magma blocks, leaving one space between them. Also, put a booster block in the base of each tower. In that way, you can complete the 25 waves. Keep looking when the blocks are destryed/converted in cheese: REPLACE THEM INMEDIATLY.
just put one "booster block" towards the soft toys, a piercieng block on it, and a wooden block at the begining. Then another piercing block on the wooden block. Then sell the wooden block and the piercing block, and put a booster block and a piercing block in the same place. then try to fill the place with magma blocks, leaving one space empty adjacent to the booster/piercing towers. The just try to put other two piercing towers more (in the same tower of the others) and they will do the rest. Piercing towers combined with booster towers are just too much
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