Many of the things you'd expect from an MMO game are in Stein.world, a real-time MMORPG set in a beautiful fantasy world:
There are a lot of different adventures that players can go on and monsters and enemies they can fight. Their skills can be learned in many areas, such as mining, herbalism, or tailoring, so they can make great items and supplies. They can trade with each other or get together with up to five other people to face the many dangers in the tunnels and waves.
You can move your character around by pressing "WASD" or the Arrow Keys. Press "E" to interact with things or non-player characters. You can turn your character around and aim ranged strikes with your mouse. There are many choices that you can change in the options window if you don't like any of them.
Have fun and good luck!