"Speed Up!" ("Faster!" in the English versions of WarioWare: Twisted! and WarioWare: Smooth Moves) is a recurring event in the WarioWare series. Every time this prompt is shown, the game increases in speed, giving the player less time to react in the microgames. Generally, two "Speed Up!"s occur at certain intervals during a level; after that, a "Boss Stage" prompt introducing a boss microgame appears, and the speed resets to its original speed at the beginning of the cycle. If the player is replaying the level, a "Level Up" prompt appears after the boss microgame, which increases the game's difficulty, and the cycle repeats. After two "Level Up"s, the "Level Up"s are replaced by "Speed Up!"s, increasing the game's speed gradually until the player loses all of their lives.
Kat & Ana
(The kanji reads「速度増加」(sokudo zōka), which translates to "speed increase".)