Tetris DS Puzzle Mode
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Tetris DS Puzzle Mode is the name given to an online Flash game that appeared on the Nintendo Arcade section of Nintendo's official website, where it was simply listed as Tetris DS. Although the Nintendo Arcade page is no longer officially in use, the game is still playable if accessed via Internet archives. It is meant to function per se as a demo for the Nintendo DS title of the same name, specifically its Puzzle mode.
The game is themed after Super Mario Bros. 3, using graphics of clouds, hills and colored blocks from that game to compose the background. Two Yoshis hold a big sign showing the level currently being played, and another Yoshi peeks from behind the game board.
Being a game inspired by Tetris, its goal is to clear several rows of blocks that are on the screen by using two tetriminos in the supposed order. The player must first select the tetrimino, then choose a viable position to fit the gap in the blocks. Tetriminos will then automatically fall into the gap. One-sided tetriminos (straight and Z-shaped) only have two possible positions to choose from, while the rest (J-, L-, and T-shaped) have four. If the player mistakes a selection, they can choose to retry the level, or go back to the level menu.
The game presents five levels which can be played in any order, and is won once all levels are completed. On both the title and congratulatory screens, the player can opt to visit the official Tetris DS website.