Skillfite.io is a survival game where you have to live in the wild and find food and tools.
You start as a level 1 beginner with no gear or experience. To get better at the game and stay alive while fighting low-level enemies like mice, you have to cut down trees, mine rocks, and catch fish.
Chopping and mining will give you raw materials that you can use to make armor to protect yourself and tools to attack. With the wood you've won early in the game, you can make gear, but you can quickly find rocks to mine copper and make something a little better.
To get better resources, you need to hit certain milestones and level up your skills. If your wood-chopping skill is level 5, for example, you can cut down the bigger pinewood trees. Even if an animal is calm, it's still worth fighting because it drops useful items.
Have fun and good luck!