Green Envy (Insane) is the final stage in Growing Green.
The level starts off with just Mooths and Owlbrows. However, when the base is hit, 2 Teacher Bun Buns come out! Since each one is buffed up to 750%, this stage is about 4x worse than Chapter 3's Moon level.
After the bosses appear, a small group of Owlbrows will be spawned. Afterwards, one Owlbrow will spawn each minute, leaving the Teacher Bun Buns unprotected by any peons most of the time.
You want to save some money. When the first Mooths and Owlbrows appear, go SOFT on them. You don't want to hit the base right off the bat, triggering the Teacher Bun Buns.
Once your money is FULL, means also the Cat Worker is maxed, spam EVERYTHING. Bringing Cat CPU can help the player very much at this. However, many Owlbrows will spawn with Teacher Bun Bun who is soon followed by another. Prepare yourself.
When one of the Teacher Bun Bun dies, consider yourself VERY lucky. When the other one dies, you will win the stage.
Once the first enemy comes out, start by sending out Sadakos very slowly, keeping the enemies stalled and close to your base, and building up your money. One Sadako should be enough to handle the first Mooth, and sending out Sadakos as soon as they recharge will keep the pack of Owlbrows at bay. When you've hit your worker level and wallet cap, begin spamming everything you've got. If you've done things right, you'll win handily. If RNGesus grants you good procs, you'll cheese the level.
Lineup: Crazed Macho Cat (20), Eraser Cat (20+10), Crazed Wall Cat (20), Crazed Sexy Legs Cat (20), King Dragon Cat (20+10), Bahamut Cat (20), Sanzo Cat (30), Necromancer Cat (30), and other Cats that can do long distance attacks or inflict slow/freeze effects to Floating Enemies, like Mitama the Oracle.
Similar to previous strategies, start the battle spamming Crazed Wall Cat to block the Owlbrows and Mooths. When many enemies begin to stack up, the player should also have maxed money to spawn everything and advance to the Enemy Base. Remember to spam your anti-air units.
Depending on how many anti-air units are stacked, the player may not have to worry about their close-range, anti-air units being killed by peons or Teacher Bun Buns, as they will most likely be frozen, knocked back, or killed before they get the chance to attack.
Because Teacher Bun Bun has a lot of knockbacks, the duo will be knocked back to behind the Enemy Base, where only long distance attackers can hit them. If this happens, you will most likely have your close-ranged attackers and meatshields killed after the anti-air effects wear off, but if the player hadn't stopped spawning peons and/or if their longer ranged units are strong enough, they will most likely destroy the Base before the Bun Buns can regain an advantage in the battle.