Welcome to this unique Monster world where monster drop out of no where to create a High walls.
This Monsters are very peaceful in nature they dont harm anyone, but their hobby to create a wall made up of them-self has caused Problems to many, making it impossible for others to move freely in the world.
Thats where You come into the picture, You need to destroy this walls. The only way to destroy this wall is make a match of 3 or more same colored monster, control the dropping monster and make the pairs of same monster to Destroy them.
Best of luck!!!