Thanks ! My (only) playtester told me that but it was yesterday night and I was too tired to work more on it. But I agree, I played it again today and I had the same feeling of sometimes unfair deaths due to unclear/missing directions.
I'm learning alone so I don't have any background in game-design. Do you know a good way I could learn basics for better balanced maps/levels in general ? When I look-up online I feel drowned by all the info available and don't know where to start or what would be a reliable source.