For anyone who wants to set up and use Joiplay. Just download the apk (simply google Joiplay apk) and extract on winrar (mobile), or however else you can. Once done and installed, open it and press the + icon and select (what I do) add game.
From there go to files and find the game (in this case "HeroPartyMustFall-0.4.7-bugfixes"), go further into the file (assuming you've extracted it as well :p ) and find the app itself.
(HeroPartyMustFallexe).
Do the final options and enjoy!
*Note* Some Joiplay accessible games require plug-in downloads as well such as (RenPyPlugin-8.0) if that's the case Joiplay will let you know, if not then the Game you've added will be available under the icon you've chosen. Click and play!
Hope this helps anyone out there.
P.S. This game is lit! Great job developer!