Stage Builder

Stage Builder is a game mode in Yeah Jam Fury: U, Me, Everybody! that allows the player to design their own levels using assets from the game. It is unlocked after clearing ten A-Side levels, and certain features of it are unlocked under other criteria.

Gimmicks
After clearing all of the B-Side levels in the game, the player gains access to a set of "gimmicks" that directly affect the level itself. These are the following available gimmicks.
 * Countdown: Puts a time limit on a level. If the time runs out, the player is then forced to restart it.
 * Mango Lock: Locks the mango behind a set amount of blocks or coins that the player must have in their quota in order to obtain it.
 * Fire Ice Blocks: Replaces the Yellow Blocks that Yeah fires with Ice Blocks.
 * Restart on Fall: Forces the player to restart the level completely if they fall off of it, as opposed to refooting at the last checkpoint.
 * Zero Gravity: Removes the gravity of the level, allowing for constant vertical momentum until acted upon.
 * Light's Out: Restricts the player's view to a small circle of light surrounding them. The player will be unable to use the "mango view" feature when activated.
 * Dude Exclude: Removes one of the playable characters the player can use after passing an All Flag, making them only accessible after passing their own unique flags.

Trivia

 * This game mode was originally planned to appear in the original Yeah Jam Fury as well, but it was scrapped for unknown reasons.