Try deleting and redownloading the game. When you download it, it should look like this (image), from here just click on the "Ika Matchi" application and you should be all good from there.
Okay, I switched to a Windows PC and got it working! I like the game!
I was originally trying with a Macbook, and I discovered that I can't open the exe file because one, I don't currently have anything that can open it, and two, the game is not supported on Mac, whoops my bad :p