Tetrominoes

Tetrominoes is an Intermediate track that makes its debut in Bloons: Monkey Continent. It is one of the tracks unlocked by attacking an enemy city's Arcade.

Information
The tetrominoes in the playing field and used as a background are Ground. The black void is actually Outer Space. Like all Arcade tracks, there is a Backlight On/Backlight Off cycle instead of a Day/Night cycle.

Trivia

 * This is my first track!
 * I'm not really sure how to determine track difficulties - help would be nice.
 * I need lots of feedback to improve!
 * Sorry that the image quality is moist garbage.
 * The bottom picture shows the path the Bloons will take - the green blur at the top is an "S" for Start.