Fun, for 1 minute. Then incredibly repitive and boring. You literally just end up doing the same thing over and over and over and it becomes exponentially harder very quickly. Past the 3rd level you need to spend an incredible amount of time running back and forth collecting money just to unlock a store that makes nearly the exact same as the one you had before. Upgrades take forever to load and if you aren't using a PiHole or playing with data/WiFi off you're gonna get spammed with ads.