Very very good. Not counting Getting Over It, I've never played a traditional 2D platformer that is centered around a non-traditional controller for this kind of genre: the mousepad.
Right click is for jumping, but this is reduced to a simple action that makes the other two shine: grappling and movement itself. Due to these two features, I'd say that the true arquitecture is not physical: it's what you are able to do in midair and being conscious about it. Unfortunately, maybe this wasn't as explored as it could've been, but it's a phenomenal project nonetheless.

I encourage you to play it. It's free.