Thanks for your comments! Yes, one month is short and I would have liked to work longer on level design.
Actually my plan is to create one game per month for the next 12 months. After that I will choose one of my games to make it a real project.
This one has a lot of potential, but it's only my second game and I don't know what comes next. :)
I see that on itch.io there is a lot of English spoken people. I could perhaps make my description in the two languages.