I didn't found what to do with the showel nor the wood, or if there is any interaction with the written stones :/

As I understand there is no action key, we can only move and switch inventory, as we can chop trees by walking on them and as I didn't see other key on your source code. I didn't look further, as the terrain tiles codes are not very clear.

I chopped all the trees I could though, so let's say I have enough wood to build a raft :)

Looks like a good start to an engine, but without any instructions or any dialogue boxes or gameplay feedback, it's hard to call this a game.

The world layout looks interesting, especially with map elements like the volcano which clearly take up more than one tile, and it's obvious that you have/had plans for more than you managed to get through here, so I'd encourage you to keep working on it.