You're talking about ModRetro, right? The physical release of this game will be done by retrospiel, a new publisher from Germany. Really nice guy with a small brick and mortar retro game store behind this 😊
That being said, I am indeed working with ModRetro on another release. It's a project that could not have happened without them. In my personal opinion the best game I have ever made. Hope people will like it 😅
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I don't know whether retrospiel will ship to the US. But you can check their online shop and see whether you can chose your address as a shipping address and it shows you available shipping methods. That's probably the easiest way to find out.
But the physical version of this game is not released yet.