Yea, I've replied somewhere in Primpy's linked thread how awesome DOSBox Turbo is on Android. It does the job just fine for JJ1 at least. JJ2 still needs a very fast device to be somewhat playable as it also needs Windows 95/98 installed.

Those screenshots Wiivn posted look out of style in nearly every way thinkable. If they decided to rip tiles, they could've at least learned how to use them.