I used to give this game 5 stars as I enjoyed it very much. But I'm not sure what's going on if it's later levels or update issues. I think after the update the coins aren't being given correctly at the end of the level. Like if you earned 400 coins then you'd only get 40 coins at the end of the level but upgrades cost 600+ coins which is way too much to try and keep going/failing every time to earn just enough to MAYBE move on to the next level.