At first i just wanted to say something really negative, not recommend the game and call it a day but I feel the need to be slightly constructive.
I would not recommend this game to anyone. There are no achievements, no incentive to keep playing. I had originally quit the game after just 4 minutes but when i realized there is a minimum time played to leave a review i went back in and finished the first "world".
What you see in the game screenshots is it, there's nothing more than just upgrading the same machines over and over with no legitimate progression. Upgrading the city gives you nothing, no upgrades or rewards. What the game became was waiting for these little in game rewards that showed up every minute that would give you like 100x your current cash, you'd upgrade your machines and sit around waiting for the next reward. After finishing the first world, i unlocked the Christmas world which is just a reskin of the world map with the same machines and same upgrades. I stopped here since I reached the minimum time required to leave this review.
I strongly advise against this game as it just feels like one of those poorly made mobile games that you see in adds that would have in-app purchase options. At least that's the vibe i get.
Just skip this one.