This game was great! I've only seen a handful of games where you switch between topdown and platformer mechanics, and even then none of them have it as two separate characters with connected worlds. I had a lot of fun with it, but it was soured a little by two minor issues.
First is that it seems really unfair that the enemies instantly kill you when you're touching them, even when it's fairly obvious that you can move away from them on your turn.
Secondly is the controls for Joe seemed a bit stiff for me? i understand that's because he has to use grid movement like the other mouse, but it still seemed kind of off.
Still, overall the game was great, and I'd love to see it expanded on in the future.