Tips-Put towers in every spot- even skeles in every spot (with upgrades) can beat level 1. 2. Attack upgrades are worth it, especially with corpses (cost 200, give money)- for 100 gold you can DOUBLE production, then triple it with another 150. 3. Don’t use the tree, it sucks. If you have a blank level use a corpse. 4. Some good formations- Slow/Stop, Slow/Dragon, Blob/Demon/Mudman (follow them up with tons of plants). Hope this helps!
Say no to pollution! Large wooden platforms have been scienctasticly proven to reduce survival rates of people running/swimming from giant sharks by 10%!