The concept seems entertaining, an ok way to waste some time, but they will NOT let you play unless you are online, either with wifi or network (personally, I will disable cell data on all apps that want to spam me with ads, and then turn off wifi when I want to play them, because then you can play uninterrupted, and only view ads when I need a power up or some bonus like that by turning wifi back on, getting the perk, and then turning it back off, just don’t forget to turn wifi back on when you use other apps that use a lot of data if you have a limited data plan!) but this app REQUIRES you be online to play it! Is it because you can play against others online? Nope. It is to provide you with new challenging and novel levels to play? Nope. It’s so that can put ads in front of your face every 10 seconds. The levels never get more challenging that it would stump a 4 year old, let alone somebody with an IQ higher than their shoe size. This is just a blatant money grab by spamming anyone dumb enough to play it with ads. If a game is good, I will gladly pay to play without ads, but this game isn’t even well animated. Find another game.