Minor English error
A rainbow-colored whirlpool twists the existence around you. You are sucked through a tunnel piercing a myriad of surreal universes. Hi! Just picked this game up and instantly loved it. Found this during a horrifying explosion that tore apart my wand of teleportation. I believe the correct use of "myriad" here would be: "You are sucked through a tunnel piercing myriad surreal universes."

Hmm... I'm not entirely sure on the use of the word... it could go either way. And this from the guy who was considering an English major.

Both are correct. It was originally a noun, as it's used in the game, but the adjectival use has been gaining in popularity since the 19th century. So I'd say keep it as it is, maybe some etymologist will notice that it uses the older form and be happy because it fits the psuedo-medieval theme.

Conceded :D Noticed a few more though, is it worth listing them?