Puzzle'n Desu is a puzzle game where players control a character in a pointed hat. The aim of the game is to push different colored blocks to form groups of 3 or more and make them disappear. However, unlike Sokoban , pushing a block will make it go all the way until it bumps into another block or the borders of the level, thus, at times, players will need to plan their actions to make sure that all the blocks of one color are gone. The level is considered as complete once players have made all the boxes disappear.
The game features a multiplayer option, where up to 4 players can compete against each other according to the rules set up beforehand. A stage builder is also available, allowing players to create and play through their own stages.
Gameplay involves strategy and planning, as pushing blocks can lead to unexpected outcomes. Players must manage their time wisely to avoid losing a life when the timer runs out.