^ You should consider if your problem is your instance of the game or your computers.
If your game files have gotten corrupted, the game might do that on all your computers. Fortunately, the game comes in a ZIP file. Use 7-zip or WinRAR to verify the ZIP file's integrity. Once you are certain that the ZIP file is healthy, extract a fresh copy of the game from them. If the ZIP file is not healthy, you have to download again.
You said you tested it on two computers. It is still possible that you've done something wrong with both. Try downloading
other Unity engine games and see if they work too.
Try systemrequirementslab.com too. It might have tools to help you troubleshoot the problem. I can't give you anything more concrete since I don't even know what kind of computers I'm dealing with.