November 20 update - Slightly Buffed Level 60

Now, there's a 1/3 probability that instead of the master key being guaranteed to spawn in the one of the room chests, an alien could be holding it, in which one has to defeat the alien (that has 4x usual health points) in order to obtain it.

Levels 64-83 are coming soon, that is when I decide to stop procrastinating on creating/implementing new levels.