Prepare for a war. Monsters are coming over the mine field and the mines won’t explode. To destroy them all you have to help them a bit.
You always hold some bombs in your inventory and for gained score you can buy more and more effective ones. For example meteors are really effective. The monsters walk over platforms, it’s good to aim for the strongest one. If some mine goes of it creates a hole so some of the monster can fall down as well. It looks simple in the beginning but the opposite is truth. The logic puzzles turn hard pretty soon and the 25 levels will entertain for long.