Tip: Make sure that ALL exit-enabled pipes, doors, etc. lead somewhere, or else they'll take you to level 0 (the "endless" bonus game).
Not logged in.
Important note: Since October 7th, 2018 the patches section has been ongoing a full fledged remoderation to convert patches to Asar and SA-1, as well as to do UberASM conversions of certain patches and some other quality control - further details here. If a patch you were searching for was removed, please check this thread to get a(n unconverted) backup.