LevelHead is just what i want for my steam deck collection. It's heavily based on Mario Maker, but
1) it has its own style and gimmicks,
2) it's on PC, and
3) it's actually very good at being a Mario-like.
The editor is intuitive, the platforming "feels good", and the tutorials make it clear that "regrabs" are an intentional game mechanic that you can and should use.
Oh also it has four-player local multi!