In this game, you need to survive by staying on the raft. But sometimes you will just need to go into the water to collect precious materials. Lots of stuff can be collected which then can be used in a Minecraft style to create tools to help you survive.
How to Play Raaaft.io
The game is not hard to play but will require some focus and adequately time of execution some commands. When you are on the raft, you need to use the paddle to move by pressing left click on the mouse. If you find yourself in the water and little fish is approaching you, then better run because that is no small fish.