A recreation of original Super Mario Bros 3 made in Monogame, working almost identically as original. I've made a few minor changes, and obviously I wasn't able to make all levels.
In order to play simply go to Release section, download zip and open shortcut contained here.
If you want to explore code and make some changes, download all files, and load "SuperMarioBros.sln" into Visual Studio. You probably need to have Monogame installed on your PC.