Draw and Merge 3D

Draw and Merge is puzzle game where you are expected to clear the board by merging the button-shaped discs.
Any discs of same size merges into one larger disc. In order to merge the discs, you need to draw a line through their centers.
So far it may seem easy to play, but you will have limited moves for the each level. Therefore, you should find a perfect path to merge maximum number of discs at each draw.
Merge them in order! Merge them at once!