I usually spam zombies with reinforcements from special zombies. So if any dies, the zombies will just infect and create more troops. pleasetakenotethisisnotthebeststrategyever.
All-mushrooms would be nice, that's true. But what we REALLY need is an automatic-harvester. I barely log on(once a week, I think), so I lose ALOT of resources for not collecting them daily. Seriously, we NEED an automatic-harvester. Atleast the people that have a LIFE.
Grab the final boss. Now see the number of bullets he sends per second. Now multiply it by 391; then multiply the result by 391 once again. That's the first level of Touhou.