So if you'll proceed to the game folder, you will only find 1 50mb Wishmaster.exe file. What does it mean? Everything's inside this huge app. The first thing we do is install 7zip if you don't have it yet, then right click the execultable and open in 7zip. Voila! Game files are there in the archive. Now you can unpack stuff anywhere you want, including the game folder.

So what do we have here? Sound0.mp3 and Sound8.mp3 are apparently the ingame music files.

But what about Data1.mgi and Data2.mgi ? Apparently, you can simply rename those to PNG to find out they are the sprites for all the characters before (1) and after the wish (2).

Data.win seems to contain all the rest, UI sprites, sounds, etc. To unpack this one, you'l have to download QuickBMS tool (check it on the web) and use this script http://aluigi.altervista.org/bms/yoyogames.bms

Maybe you'll find this more interesting than the game itself...