It took me 189 days to cure Zombeism on Normal. When I first saw this game, I thought I'd play it for a few minutes and get bored, because I'm not really into games like this.
Oh, how wrong I was.
This game is fantastic and definitely deserves the #1 spot. I spent a good hour or so playing.
Waffles911, information on how to defeat the boss is explained to you in your Codec. I thought it was frustrating that I had no way of beating him, until I noticed that a bunch of diamonds fell out of his body when hit from rocks, completely oblivious to the fact that the info was in my Codec.
tl;dr
Make his meteors fall on him, then collect the diamonds. Don't whine, look at your Codec for once.
 "Rebuild"){kind=icon}
 "Level Up!"){kind=icon}
 "Fragger"){kind=icon}
 "Use Boxmen"){kind=icon}
 "Little Wheel"){kind=icon}