The exact remake of Super Mario Bros (World 1 Level 1).
Thanks for your comment aerger.
I just want to mention that you can jump while running. If you're unable to do that, it's probably your laptop's keyboard dis-functionality. And most of the problems (not all) can be solved if you use Chrome. I think Firefox has a little problem with font sprites (cutting off one extra pixel or the opposite) and if you got the chance, play it with Microsoft's new browser, Edge. It's the total acid experience!!!
And yes, I used Nicolas Dingle's tutorials and done a lot of work on top of his, but without the tutorials, this was impossible.