[Welcome to day 90 of Man Vs. Donkey Kong. Why am I playing through all 101 stages of Donkey Kong (Game Boy, 1994) in 101 days? Go back to the beginning to find out. All caught up? Good. Proceed.] Though I fancied myself an artist and a storyteller (I’d written my first book in the third grade—a biting, mostly illustrated satire titled Planet of the Grapes), I actually did surprisingly well in math, too. Sure, I was marginally intimidated by instructions like, “To start using VICMON type SYS24576 or SYS6*4096, and then press the RETURN key.” But considering my comfort level with equations,…