Merge N Stack

Merge N Stack is casual colour merge game where you merge cubes of same colour and form stack.

Your task is to merge same colour cubes, make a stack of 4 to blow up the stack, thus making space for more cubes.
More cubes you place more score you get.

You can only place cubes till the red line.

Controls:
Swipe Left / Right to move the cube.
Swipe Up to merge the cube.