Ok, downloaded the lastest bobz build (dated march 7) and tried a couple of games and encountered a similar problem with some of them (all ran explicitly from the commandline):

R-Type III third lightning (shows title and then turns black)

Tiny Toon Adventures - Wacky Sports Challenge (starts first demonstration then turns black)

Super Castlevania IV (shows part pf the intro sequence and then turns black)

also tried Super Bomberman Panic Bomber W which only shows black screen (it also fails in 0.136 where it says the following "warning: write to sound test register with data 00!")