this game is pretty fantastic. before i say anything else, here are some screenshits:


it includes a complete re-creation of the original mario levels as well as a portal map pack with some fantastic puzzles. oh, and you can make your own, too! =D the best part, though, is this:

and you can even make your own hats, too, if you add them in manually (it isn't supported by default).
the game is written in lua, using the LÖVE 2d game framework.
http://stabyourself.net/mari0/https://love2d.org/oh, and if you're running on linux, getting it to work is a bit tricky. you have to add this ppa:
sudo add-apt-repository ppa:bartbes/love-unstable
and install the love-unstable package from here for it to run. you can use that from the command line to run it, or, if you're lazy, install the current release (.72) as well from the official love site, head to /usr/applications, and change the properties of the LÖVE desktop file so its command is love-unstable instead of just love. that way you get all the fancy MIME types, etcetera, and can just double click to run it.