Like Runey tried to explain, if you are playing on Windows like you state, you do not need Joiplay and should not install it on your Windows PC for playing Harem Hotel.
On Windows, download the PC version of Harem Hotel, unpack it, then run it by clicking the .exe file.
Note there are two .exe files, one is for 32-bit Windows, the other is for 64-bit Windows.
You can even search google for Joiplay Windows installer and there isn’t one offered anywhere.
If you have discovered that, you should not expect a game developer to provide you with an installer that does not exist.
My guess is Joiplay on Windows is for developers testing Joiplay who do not want to do the testing on their Android phone.
