NSMBW 'long' custom level - Derelict factory

One year ago (15/07/11) I uploaded a NSMBW custom level: Desert Ruins Returns. It became more successful that I thought it would and, by now, it has surpassed 100.000 views. Consequently, I decided to make another long and puzzle-themed stage. This one is even longer than Desert Ruins Returns, and the puzzles are more complex. Sadly, due to the length of the level, it is extremely glitchy.

This level...
-Is really, really, really long.
-Has 4 custom musics, which are:
Hightall Falls Galaxy (Super Mario Galaxy 2).
Lanayru Mining Facility, present (Zelda Skyward Sword).
Lanayru Mining Facility, past (Zelda Skyward Sword).
A fast version of the previous song.
-Features lots of puzzles and weird mechanisms.
-Includes a few custom graphics, which are:
Red and green areas.
Danger sign.
Something near the end which will probably surprise you.

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