Welp i can't find anything wrong.
Looks like itch can't either ( https://itch.io/t/714142/it-would-be-nice-to-be-able-to-report-our-own-games-to-tag-itch-support )
I re-tagged things and saved the game page. Perhaps that fixed it?
Viewing post in Cannot download this game for Windows.
I downloaded it with no problem and never saw that screen that Klokinator showed.
By the way, is there any way to delete high score name characters before finalizing? I accidentally printed a number as my first high score name and I couldn't figure out how to undo it.
Also, is that rainbow laser supposed to not destroy asteroids? It didn't for me but the game got hectic so I couldn't read its name in time.