Zodiac Snake

Guide the snake across the board and collect zodiac signs. Gather all twelve to close the zodiac — the circle then starts again, faster.
Steer by tapping the board: tap near the top to turn up, tap on the left to turn left. On a computer the arrow keys and WASD work too; Space pauses.
Don’t hit the wall, your own tail, or a stone — stones appear on the board with every zodiac you close. Each game you play earns 1 osudka, up to 3× a day.