Little Bubu Fillz is a free online puzzle game where you swipe to guide an adorable bunny across a grid, filling every single block on the board without missing one. Each level is a carefully designed tile-filling challenge that starts simple but quickly demands real strategic thinking as the grid layouts grow more complex and unforgiving.

The core mechanic is straightforward — swipe in a direction and Bubu slides until hitting a wall or edge — but planning your sequence of moves is where the real brain work happens. One wrong swipe can leave tiles uncovered and force a restart. The colorful visuals and cheerful sounds keep things light, but veteran puzzle fans will appreciate how deceptively tricky later levels get. There are no timers, so you can think at your own pace, making it genuinely relaxing even when a stage stumps you for a few attempts.

Little Bubu Fillz is a great pick for fans of sliding puzzle games, fill-the-grid brain teasers, and hypercasual puzzle challenges. It works perfectly on both desktop and mobile browsers with no download or installation required. Whether you're looking for a quick mental workout during a break or a casual puzzle game for kids and adults alike, Bubu delivers satisfying level-by-level progression. Search terms like cute bunny puzzle game, free HTML5 grid puzzle, and online tile-filling game all lead right here.