I suppose it was because I just became aware of the NES homebrew by Rigg'd Games / Lowtek Games -- "Chew Chew Mimic", that I wanted to pop in Chu Chu Rocket on the Dreamcast (released spring 2000 in North America). I can't remember what year it was when I last dabbled with CCR. So the game felt new to me, and I tried the 1-player puzzle mode. The goal is to guide mice into rockets, avoiding cats if they exist on that stage. You use the Dreamcast's 4 buttons to place Up / Down / Left / Rig