A classical nonogram (think picross) puzzle with a twist: you are fighting monsters while you solve the puzzle: every 30 seconds (don't quote me on that number), the monster will deal damage to you. Every time you fill an entire row or column of the grid, the timer goes back to 0. There are also some items to prevent damage, partially fill the grid, or replenish HP.
So essentially, it's a nonogram in limited time, which might be a dealbreaker for you. If you are good at them, you'll find it is pretty forgiving, but ymmv.
Overall a good experience, but I'll redirect nonogram enthousiasts to Paint It Back which is essentially a better game.
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