Game Designer Zach Gage on his love of editing existing games——where he plays with expectations within a well-established rule set——and how making a few small tweaks to the cellphone classic “Snake” led to surprising gameplay in his game “Snak” for Playdate. Plus: Panic Designer Neven Mrgan talks about the inspirations behind the art he created for both the in-game graphics and the launcher card, an homage to over-the-top game box art of the '80s and '90s.