These instructions are also on the game, as well as the graphic legend.
Walk against ice cubes to move them out of the way. When an ice cube is next to another ice cube or against the wall, keep pushing to break it.
Free gold coins by crushing the ice blocks around them. Just be sure to watch out for the flames.
5 Points: Breaking an ice cube.
50 Points: Putting out the flame with ice.
1000 Points: Freeing all coins and going to the next level.