Lots of hidden stuff and it's good

It gives a lot of hidden stuff and the game is simple. I played a similar game around last year, and with that one or this one, you can upgrade everything just by watching tons of ads, which is convenient. This one has a bit more to do, though. You only get 5 XP for manually chopping special trees, mining ore, or moving final products, and repeating that to level up is the hidden objective... it's a bit tedious lol