End of day 12!
I was able to do the initial screen, a simple one with a transition to the first level, and to start and complete the second level.
Tomorrow's goal is to do the third and final level, with an interactivity with the 'ending'.
Hopefully I will be able to complete these tomorrow to test everything and eventually add some new details, the core of the gameplay is simple as it is a platformer but I think it is answering well.