Ultra

Ultra (or Time Trial) is a game mode where you play the game until the given time limit (usually 3 or 2 minutes). The objective of this mode is simple: Score as many as possible. (Except for some games; see below)

If you top out before time runs out, the game ends instantly. In most games, your score will not appear in leaderboard for this case.

Some games allow players to choose level. In most games the level does not increase throughout the game.

List of games that have Ultra mode
The list is incomplete. A blank cell denotes a yet unchecked element.