I dont think it is possible to play your game... At least I couldnt play.
I have followed your instruction and got some errors after running exe file. Never used rpg maker but I think that you need to compress whole game to zip, had to do same thing with my unity game. At least if you compress the game people wont need to click DOWNLOAD button 100 times.
I also think that you need to have more files. I watched tutorial on how to upload game from rpg maker to itch and developer in that video had more files and folders than you.
tutorial in question (timecode somewhere at 2-7min):