Game is a massive battery drain, also it is only pvp with p2w mechanics. There is a co-op mode which is fun but that is time-limited / max 3 per day. There is an option to play with a friend, but if you don't have any playing this only 3 attempts per day. The pvp part is flawed with bad opponent selection, sometimes you can't win and are forced to lose from start (opponents has premium towers / upgrades). If you can get around that you can only play until your battery dies (it uses a lot).