I decided to work hard on this project, alone, and never talk about it until it was well polished. For the moment, i will communicate about it in a few indie game forums in order to have feedbacks from developers and professionals.
Here is Infinity Land (BETA): https://infinity-land.net/ It's a sandbox platformer, you can create your own levels, and share it with the community. Greatly inspired by Mario Maker of course, but also: Metroid, Mega Man, Super Meat Boy, i wanna be the boshy.
The trailer:
The levels i design are pretty hard because i like to improve from dying! but i will make more easy levels for beginners. I suggest you to look at the SPECIAL INTERACTIONS page https://infinity-land.net/interactions.html to know more about all the subtleties.