well the thing is, having alot of items is meaningless when the best items are so easy to get. this makes all the lower level items completely pointless.
theres a pretty game breaking bug, where the first kid that hops on the icecream van goes invisible, and there is no way to kill it. the only option is to quit the level and restart.
as soon as the doomsday tower becomes available, you can simply build nothing but doomsday+splash ice+1 or 2 fire unicorns. and win.
i also noticed mrsarki you took out being able to send next wave early =[ but the levels do seem easier. i still cant beat the last level =[ the fire burn damage seemed to have been decreased.
see my post here
http://www.kongregate.com/forums/3/topics/49461?page=2#posts-1128800
for strat to beat all levels to 25.
and mrsarki, possibly a bug in one of the extra maps.