Here's the full timeline of events:>Roomies
A slice-of-life webcomic about college roommates. It was begun in Willis' single year of college and I believe was published in his school paper, after which he dropped out and went on to continue the comic as a webcomic.>It's Walky
A sequel to "Roomies" featuring the same characters, but as secret agents for some kind of science-fiction agency. The comic eventually ended and spun off in two directions:>Joyce & Walky
The first "It's Walky" spin-off and another slice-of-life comic, following the titular Joyce and Walky. I believe it maintained the dramatic/science-fiction elements of "It's Walky"; I've never bothered to read it at length. This series had a spin-off of its own:>It's Pregnancy
A very short read, as this was a comic that was created during the pregnancy period of Willis' wife. Very much comedic slice-of-life, obviously.>Shortpacked!
The second "It's Walky" spin-off and harder comedy comic strip in which several characters from "It's Walky" work at a toy store. This is the comic that people know Willis for, primarily thanks to its later years in which it lost its comedic neutrality and started to become a soapbox. The comic ended in 2015 with a cliffhanger in which Soggies, villainous characters from old Cap'n Crunch commercials, invade the Shortpacked universe, and by default the entire "Walkyverse".>Dumbing of Age
At some point in 2010, Willis got the bright idea to start fresh. He decided to dig back into his own past and resurrect the concept of "Roomies", but with the idea to simply do everything as differently as he could have done from the Walkyverse. Thus was born "Dumbing of Age".
And knowing is half the battle.