Anyone know why this game is so addictive?

Not sure about you guys, but something about this game keeps me coming back. Compared to other merge games, it feels so satisfying to merge things. I’m thinking that between your long term goals of merging, most games just have you make super long merge chains. But in NecroMerger it rewards you for even short term merges, be it champions and daily items for merging anything. Just appreciating the game, and I’m just getting to level 41, so the fun begins soon