Koutack and the star tile on the board
Koutack turns the puzzle board into a minimalist tile stack, but the trick is in where you can build next. You click an empty square beside the pieces, then pile the colours until the whole layout comes together, with the golden star tile adding a clear target when it appears.
Only the open space next to the tiles matters
Every move starts from an empty spot next to the stack, so placement is everything. That small rule changes each board into a careful positioning challenge rather than a fast shuffle, and it keeps the focus on the space around the colours as much as the colours themselves.
Chasing the gold star on each level
When the star tile shows up, you want your pile to land on that square and claim the bonus. The goal is simple to read at a glance, but the path there can get tight as the coloured blocks spread across the field.
More about the clean stacking style
If you enjoy the way pieces lock together in Sort Tiles or the single-board planning in Eleven Eleven, this game will feel familiar in the best way. It also lines up with Ball Sort Puzzle and Tangram Puzzle because each move is about reading shape, space, and order before you commit. YaYoYe keeps it no download and no signup, so you can jump straight into the stack-and-clear rhythm.
Because the layout stays stripped down, every tile you place changes the next option in a very visible way. That makes Koutack easy to read, but not easy to master, especially when you are trying to line up the star tile and finish the board cleanly.
You can also connect it with sorting, block puzzle, coloring, and colors themes without the game ever losing its sharp, minimalist feel.