Hey, it’s komehara here! We exchanged some emails about a potential collaboration with Super Sonic Heroes (since it’s also made under Godot and using GBA sprites). I saw the link to your Discord but unfortunately I hit the 100 servers limit (again, but for a good reason, just joined a local Sonic community) so I won’t be able to follow development closely for now. However, you should still be able to send me a DM/invite directly (I put my Discord username in my last email).
Anyway, I tried to install v0.1.1 via itch app but it failed. It looks like itch needs a direct link to the zip in GitHub releases to properly install and unzip it (in your case you’ll need to prepare two links, for Windows and Linux).
You can also put a link to the GitHub releases page if you prefer to let user read the changelog before downloading the version they want. It’s probably good to do both (the external link to zip will still be useful for itch app users).