Basically, it's highly likely that we won't be getting new playable updates in the future (like the files we've been receiving in the author's subsequent update). This is because the author wishes to focus on updating the game instead of spending more time / resources to compile and design new playable demo for every updates introduced into the game. He'll still be updating the status of his work on his Ci-en and Social Media.
You can still keep in touch with the author's work over here:
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Sauce for the author's cancellation of paid plans and playable demos in subsequent updates:
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