Cute little time waster. You constantly have to babysit it so it feels like youre always progressing. But you can just pull it out when you are bored. Theres a banner ad at the top that you can pay to remove, Then optional ads for weak boosters that arent reallly necessary, except you unlock some cats by watching so many ads from different boxes so you gotta watch em if yiuwant to collect everything sadly. IAP seem just there to speed things up, though you may actually require IAP down the road to finish everything. Worth playing if you just need to kill time. Not worth it if youre wanting to invest in a deep app.