If you're tired of the popular IO games that use the same formula over and over again, try Tribs.io. This game is similar in terms of its gameplay mechanics, but it has some unique features that make it feel fresh and original.
When you first start the game, you are given the choice of three tribes to play for: plont, agwa or faya. The relationship between the tribes are similar to that of your classic rock-paper-scissors: for example, faya can consume plont, but fears agwa. That in combination with a great system of upgrades and cute visuals makes for a really entertaining game.