Thin Ice

A star battle puzzle game starring penguins!

Place penguins such that each row, column, and region contains exactly 1 penguin, and no 2 penguins touch.

Note: The 7x7 board generation can range from a few seconds to about a minute depending on how difficult it is to ensure uniqueness on the randomly sampled solution state.

Controls

Left-click - Place penguin
Right-click - Mark cell

Credit to RubyRed for the background music!