To anyone looking to purchase this on itch.io because they don't like DRM, be warned, this game requires a registration code which has an unclear purpose that I can only assume is a type of DRM.
I don't think I'm particularly salty, I just don't like DRM for what I consider to be good reasons. I'm not mad the game has it, I'm just trying to warn anyone else who similarly prefers to not pay money for a product made lesser by the inclusion of DRM. Anyone who doesn't care can still purchase the game, and it's not my problem. As for why I don't like it, it's because there's no information on how the mechanism to enforce the serial key works, and the only way I can think of that makes any kind of sense is to have the installer/game code reach out to a server to verify that it's correct. Which means that there's likely an external dependency that, if it goes down, will impact my ability to use the product I paid for. Which I don't like. I also dislike DRM in principle, because it doesn't solve the "problem" of piracy it's supposedly meant to solve while often having negative impact for paying customers, which is usually at least the risk of eventually losing access to the thing they paid for, but also includes limiting the ability to install on multiple devices/transferring to new devices, sometimes impacting performance, and in the worst cases installing rootkits that create security vulnerabilities.