After first eating pancakes, then buying a week of take-out, my microwave was stolen, so I get hit with penalties for not eating the day before. Even though I ate the damn pancakes.
Incredibly easy. Fire towers, and nothing but un-upgraded fire towers, were easily sufficient to beat every level on normal. Upgrades weren't worth the money, except the first level or two of arrow tower, since most of the time you got more dps by building another tower.