The most "mari0"-styled hack out there, with the most freeform level designs that are a breakthrough from the usual format. The only downside, however, is that the pacing is entirely linear with a complete lack of sub-areas apart from the obvious underground/underwater ones, thus making side pipes useless and no vine blocks to be seen at all.
Some maze levels would also work well in this format. Just imagine being able to exit through different X and Y positions... Regardless, still a demonstration of great technical ability of the tile-based format.
