The inspiration for gameplay came as a result of a simple animated character sprite in an 8×8 pixel box created by Dailly using Deluxe Paint as part of development for "Walker", then envisioned as a sequel to "Blood Money". Dailly was able to quickly produce an animated graphic showing his creations moving endlessly, with additional graphical improvements made by Gary Timmons and other members of the DMA Design team to help remove the stiffness in the animation. One member, Russell Kay, observed that "There's a game in that!", and later coined the term "lemmings" for these creations, according to Dailly. Allowing the creatures to move across the landscape was based on a "Salamander" weapon concept for "Blood Money" and demonstrated with the animations.