I agree it's more like jumpman but I wouldn't say it's a successor to either. I'd say that it's a (relatively) modern interpretation of simple platformers that

I agree it's more like jumpman but I wouldn't say it's a successor to either. I'd say that it's a (relatively) modern interpretation of simple platformers that could work performantly on the flash runtime in 2005. Jumpman being a seminal early simple single-screen platformer offers obvious parallels but not more than if someone made a simple FPS today would be "the successor to doom(1993)", if that makes sense.