Interesting. Didn't know RPG Maker MV is essentially a custom browser. Learn something knew every day. But in that case, you're right in that it doesn't make sense. So, you got me.
Update 9-14-20: Relatively recently I got Itch.io App working on my linux computer. Through fiddling with another program I found out that your RPG Maker game and some other apps will only work if installed and ran through the Itch.io App. So I tried installing and running yours through the Itch.io app and it worked. I've already played through the demo and I really enjoyed it. Well done. Did you make the assets yourself or was it premade assets? I'm fiddling with RPG Maker MV myself through steam, so I'm just curious.