In Haru Ichiban, you and your opponent step into the shoes of apprentice gardeners in a zen duel that is anything but peaceful. The goal is to harness the 'Wind of Spring' to arrange blossoms on lilypads in a pond, creating harmonious patterns to score points. The gameplay is a strategic tug-of-war: each player has flower buds numbered 1 to 8, and every round, you simultaneously reveal one of them. The player with the lower number becomes the 'Little Gardener', while the other becomes the 'Grand Gardener'.

This hierarchy determines the sequence of actions. The Little Gardener starts by placing their blossom on the lilypad that is currently showing its dark side. Then, the Grand Gardener places their blossom on any lilypad of their choice. However, the power shifts immediately: the Little Gardener can move a lilypad to an adjacent space (potentially shifting other lilypads along with it, disrupting the opponent's plans!), while the Grand Gardener decides which unoccupied lilypad will be flipped to its dark side for the next round.

The game is a constant puzzle. You score by creating specific shapes: a 2x2 square is worth 1 point, horizontal or vertical rows of four are 2 points, diagonal rows of four are 3 points, and the ultimate achievement — a row of five blossoms — grants 5 points. If you reach 5 points, the game ends and you win. If no one has reached the target, the board is reset, and the struggle begins anew with a fresh hand of buds. It's a game of positioning, memory, and resource management, where one precise move can shatter your rival's strategy or pave your way to victory.