See I Wanna Maker in vid form, watch here.
"I Wanna Maker is a precision platformer with a robust level editor and online level sharing, based on I Wanna Be The Guy fangames. Create complex levels using a variety of objects, a powerful events system, and customizable visuals. Browse levels online, make playlists, and take on challenge modes!"
At a glance categories:
Precision Platformer, Level Editor, 2D Platformer