The game has a really nice art style that is at the intersection of spooky and cute. Simply drag and drop identical monsters to fuse them and create a stronger monster. Each time you discover a new type of monster, you will unlock a new part of the mysterious castle. Once you've explored all of the castle, you'll unlock a new world that is full of fairies, and a whole different world with a different and more colorful atmosphere! The game has other secrets and worlds for you to explore. You don't need to wait for Halloween to get a little spooky. Can you unlock every castle and world in this addictive merging game?