The only problem I found is how the safety card is implemented.
Playing a safety corrects the corresponding hazard and also protects against future hazards of this type. However, when the safety is played normally, a Roll must still be played before any distance cards.
The way it is implemented here, if a hazard card is in play, many turns later a safety can be played and the game automatically has you moving again as if a roll card is in play.
Developers, please fix this!
Rotate fail about Mille Bornes®, v4.0