The easiest servers to start playing on are 'Crazy', and 'Selffeed' servers. As you play, you will level up your account if you are registered and logged in. If you are a new player, you will not have any powerups, so you will need to either farm them in the game, or collect coins in game and buy them from the shop. Powerups will display in the bottom of your screen, in your inventory. Powerups help you reach the leaderboard, are incredibly satisfying, and make you feel powerful. Use your mouse to control where your cell moves. You can also hold W or Z to autofeed and autosplit. Depending on which server you play on, there are different ways and techniques. As you grow larger, you will reach the leaderboard (top right of your screen). The purpose of the game is to grow large by eating other smaller cells and dominate the server. Agma is a simple multiplayer game (but with very advanced features) where you eat food and other players to grow larger.
