Sky City - Day 1 (Pre-1.8)

Castle in the Sky - Day 1 is the first level of Castle in the Sky. Rotobaga is pre-selected at the start of the level, and no special zombies appear in it. After beating it the first time, the aforementioned plant is obtained.

Difficulty

 * Due to all zombies being level 3, the player should act reciprocally and pick plants with levels as high as possible. Area-of-effect plants are also advised.
 * The flamethrowers yielded by basic variants are not strong and will not do enough damage to the player's house in order to produce a game over. Nonetheless, the player is severly limited due to Rotobaga and Ghost Pepper being the only flying plants that can be used on the first playthrough.