When the original Boulder Dash action-puzzle game hit computers and consoles in the early ‘80s, it was a smash hit. That’s the good kind of “smash,” mind you—not the kind that caves in an explorer’s head. Boulder Dashstill challenges and fascinates retro puzzle fans, but even the classics need a bit of a spit-shine after a few decades. That’s why HeroCraft is working on Boulder Dash-XL, an upgrade of the original for iOS.