hm i'm away from my pc at the moment but, if the game comes in a zip folder you should extract it, if you don't have an extraction tool, download 1 called 7-zip, i think its one of the best, try to get it from the main website as others may have viruses or other spamware etc etc.
if that's not the issue and you can see every file, clicking on the rpgmaker icon with the little man standing on a block should open the game
icon will look like this, but it's really small depending on your file explorer settings so check all of them/ enlarge your viewer options, if it's still not working, try to narrow down the issue, show me what's actually wrong by going into one of my recent devlogs, finding the discord server and post some screenshots there