Started off fun, but this game is painfully slow without paying for credits, and credits are EXTREMELY OVERPRICED. Upgrades are poorly balanced (High cost, high build time, can only build two things at a time without paying with credits). Seems to be a lot of fake 5-star reviews, and lots of responses from the developer telling people it is free-to-play, it's just the user's fault for not having enough skill. I think this game has great potential, but I'm uninstalling for now.