High Gravity

High Gravity is a canceled mini-game that can only be accessed using a Cheat Engine.

In this level, as its name suggests, the gravity is so high in this mini-game that the projectiles fired by any shooting plants will hit the ground. The projectiles that are fired by lobbed-shot plants will only be able to hit a zombie at a close range.

When a Balloon Zombie appears, it will fly over three squares before its balloon pops. While it is walking, it appears to be slipping.

Limbo Page
There was a page of Mini-games which were canceled before the release of the game, called Limbo Page. The creator did not publish a visible link to this page.

Gain access to Limbo Page
Add three addresses and change all the value to 144.

See this video tutorial.

Strategies

 * One good strategy is to use Garlic and Gloom-shrooms in the second and fourth lanes, but it must be placed carefully, or the balloon zombies will chew on or possibly even eat the Gloom-shrooms.
 * Another strategy would be to use Fume-shrooms in all lanes. Use up to three columns of Fume-shrooms per lane with a Tall-nut in each lane for protection.

Trivia

 * Fumes and Corn Cobs are the only projectiles that are not affected by the gravity.