Beside the title being misleading (it's a 30-symbol password, not 30-character, as "character" implies printable ASCII to most people), the math doesn't quite make sense:

Before running, the game creates a random sequence of 30 letters chosen from S, D, F, J, K, and L, with no repeating characters. This equates to around 38 bits of entropy

So that's 6 choices for the first character, and 5 choices for each of the next 29 gives us log2(6*5^29) =~ 70 bits of entropy. Does anyone know where this 38 bit figure came from?