Download was a bit tricky because i think you are a resident of a specific country blocking your download. To be able to download your game, i had to click on "Downloads not starting?" shown on this download page.
Then a box appeared suggesting :
Some regions have been known to block itch.io's download host, Google Cloud Storage. If your downloads aren't starting then you can try enabling alternate download mode and trying again.
(box) Enable alternate download mode
I had to check the box and click again on download.
I'm 95% sure most of players will not try what i did so i encourage you to upload your game directly on itch.io rather than keep it on your personal server.