As there are locked goal tiles and two open areas on level 234, we recommend focusing on one of the open areas making matches only there. You should release the pre-set bombs from the ice and move from the top left corner of the field to the bottom right one. However, this strategy largely depends on the position of pieces at the beginning of the level. It is possible for them to be placed in such a way that it will be easier to start clearing the field from the right side. To decide where to start is up to you.