For a free to play game, Shop Heroes is surprisingly well balanced. I love tycoon/sim type games, and this is one of the best mobile or Kongregate versions I've seen. There are some bugs and choke points - the tannery and mine max out pretty quickly, which is a big choke point - but nothing I can't live with. Very enjoyable game!
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Thank you for the feedback! We're happy to see you are enjoying the game.