Inside the OS, there's a game called Danger Cross, which seems very similar to crossy roads. Did the Puter developer essentially reimplement crossy road? Or was there some open source version already existing could somehow run on this "OS" ? Briefly searching google for Danger Cross didn't yield any results.
Never played Crossy Roads so I don't know the full extent of what gameplay features there are, but from looking at screenshots, looks like the gameplay code could be done relatively quickly (like some days at max), so doesn't seem out of the question that it's a full re-implementation.
Crossy Roads looks like another clone of Frogger, and clones of that game have been done since the 80s.
