Marble Circuit

Marble Circuit - a tile puzzle played on a five by five grid where part of the tiles start lit and the rest stay dark. A tap flips the chosen tile together with its four side neighbours, so a single move changes up to five tiles at once and the pattern shifts across the whole board. The round is cleared when every tile on the grid goes dark. Each level comes with a move counter built from the shortest solution for that layout plus a small margin, and the counter drops by one on every tap. Layouts are made by scrambling an empty board, so each of them always has a solution, and deeper scrambling on later levels makes the pattern harder to unwind. Points are added for every cleared level: the level number, the moves left in the counter at the moment the grid goes dark, and an extra amount when the level is cleared in the shortest possible number of moves. The run ends when the counter reaches zero with lit tiles still on the board, and the final panel shows the points of the run, the level it stopped on and the best result kept on the device. A pause panel is available at any point during a round and holds resume, restart and exit to the menu, where restart begins a fresh run from the first level. The stats panel keeps eight counters updated after every run: games played, best result, total points, average points per run, levels cleared, taps made, levels finished in the shortest number of moves and the deepest level reached. Settings hold a vibration toggle, a visual effects toggle for tile sparks and the screen shake on a finished run, the saved best result with a reset next to it and a reset for the whole progress. Everything is kept between launches, and a separate rules panel in the menu explains how the tiles react to a tap.