1st board: Fire line blasts towards the green gems. 1,200 points in gold-striped blocks, ignore them.
2nd board: Fire line blasts towards the pink gems. Use the Magic Orb as soon as you can hit the missing number of pink gems to open the exit. 12,000 points in gold-striped blocks.
3rd board: Treasure room with three colors. Good for the remaining points if you have enough moves left.
This level is similar to Level 423, with 18 moves instead of 24, but one line of blocks in the fourth row instead of the third row on the second board.