You need an emulator. You cannot run the original .exe file on Mac natively, but you can run the original Windows environment inside your Mac.
This method runs a tiny, legal copy of Windows inside a window on your Mac. Purble Place Download Mac Free
Have you successfully run Purble Place on a Mac? Let us know in the comments. You need an emulator
Wineskin uses a compatibility layer (Wine) to run Windows .exe files directly on Mac without installing a full copy of Windows. Purble Place Download Mac Free