for some strange reason itch.io loaded the game in both .exe and html5 yesterday but it had disabled the .exe file I think because I had made a mistake in setting the payment method or cost. the game is FREE but I still had to enter a payment method and a price otherwise the "download" button would not appear on the game page. sorry for the inconvenience, now you can play the tutorial on html5 and try the full game from .exe