What is this?

You are a builder, and your job is to construct various items. In order to do so, you need to gather various materials, such as iron and coal. However, you need to be aware of the dangers in the world. If you are not careful, you could fall into a river and get drowned. In order to survive, you need to construct a raft and try to get to the other side.

Why is this?

The reason for this is that the game is very easy to play, yet very difficult to master. The most important thing is that the gameplay is unique, and this makes the game very fun.