I love that they are so easy to get into, there is not a lot of story, cut-scene heavy sections or just a bunch of text bubbles. It's straight to the action. I love 2d platformers especially doing speed runs, that is pretty addictive. Like some of the videos from NSMBW, just running through a level never stoping that takes quite a lot of skill. Which is fun so you can master a level they are easy to get into but they take some time and effort to master.







