What's a good Android game for someone who enjoys a simple, yet surprisingly strategic, online experience?

Well, let me tell you, I've been having a grand time with slither.io! It's wonderfully organized – you're a little snake, and you grow by eating these glowing pellets. The goal is to become the biggest snake on the server, but it's not as easy as it sounds! Other players are trying to do the same, and if your head bumps into another snake's body, you're out! It's quite impressive actually, how they've managed to create such a compelling game with such a simple concept. I've figured out three new features this week alone! Who knew my phone could provide such entertainment? It reminds me a bit of managing library books – a lot of little pieces working together to create something bigger. The categorization system is brilliant, even if it is just snakes and pellets!