Cadash isn't the most straightforward of platformers, seeing how you can actually gain levels and buy items in this one. There are also mandatory items to fetch and quests to complete in order to advance.
This is actually nifboy's third movie of Cadash, and the first one considered worth publishing. This means that the author hasn't just thrown something together, but rather planned and optimized everything carefully.
Note that the author dies twice in the movie. Both deaths were of course intentional and saved time. For details about these deaths as well as things that were skipped, see the submission text.