Dosun-Fuwari

Fuwari-Dosun is simple puzzle game.
Place balloons and iron weights according to the following rules.

1. Place one balloon and one iron ball in each of the areas surrounded by blue lines.
2. Balloons are light and float, so they must be placed in one of the cells at the top, or in a cell right under a wood boxes or under other balloons.
3. Iron weights are heavy and sink, so they must be placed in one of the cells at the bottom, or in a cell right over a wood boxes or over other iron weights.