The graphics look amazing from the screenshots, and I liked the description, its a shame for us not to be able to play it, so I think you should make another itch.io page and upload the game there (preferably as WebGL if possible). I'll be happy to give you benefit of the doubt that it's the same game you were going to upload for the jam if you do and rate accordingly. After all, game-jams are mostly about the experience and the feedback!
Similar to you I submitted merely a few minutes before the deadline, and as a result I wasn't sure if what I uploaded was correct or not, but I decided to publish a WebGL version after the deadline to save people the hassle of downloading it (it's the exact same game, bugs and all, just in web format): https://moocow17.itch.io/rewind-bullethell-web-version
I've just been asking people to play the web version and rate/provide feedback on the official jam page (https://itch.io/jam/brackeys-4/rate/724985 ). I'd suggest you do the same, it would be such a shame for no-one to play the game you made! Especially since it looks so pretty!