thanks for reply and sharing what you used! actually found your game through the gbstudio twitter! i was actually asking for the .gb file to play your game on my phone without internet connection.
Here's the (current) link to the ROM file being served by itch.io. It's on a CDN so it's got a strange looking address. (you can also see it in your browsers developer -> network panel by filtering on "game.gb".
https://v6p9d9t4.ssl.hwcdn.net/html/2314031/web/rom/game.gb
For baerheather: The ROM file is inside the zip file you upload to itch.io, often in a "rom/" folder and labeled "game.gb"
Hope this helps.