Starve.io is sever based, max 99 players per server. You have 3 things to worry about: Life, food, cold. Hunt animals like rabbits to get food because if you are hungry, your life points are starting to decrease. Find a fireplace to warm yourself up at nights and watch out for monsters. Move around with WASD and point the mouse towards your enemy and left click it to attack. You can also gather resources, like wood for example.