License clarification

[Leseratte10]

I remember a couple years ago Riivolution was closed-source and only available as binaries. Great to see that the source code is now available in a public repository for people to look at.

WiiBrew's Riivolution page lists Riivolution as "Freeware". Does that still apply, meaning, the source code in this repository is purely to look at, and there's no actual open-source license that the code is published under? I didn't see a LICENSE file, nor a mention in the README or in the source code files.

Would it be possible to publish Riivolution under an Open-Source license like the GPL? Or, if that's not possible and Riivolution is intended to still be Freeware, just with source code available to look at, could a LICENSE file be added to this repository regardless which clarifies that Riivolution is not under any open-source license?