Trust me, don't even bother downloading it, complete waste of time. This "demo" is more like a gimmick that shows he is working on "something". I'm so glad I'm not paying him. Apart from 4 nude pics that you see after defeating textureless blobs, this is the exact same thing he posted a video about it on his youtube channel 5 MONTHS AGO. watch it here.
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Personal opinion: I don't know when will the update is going to hit but after it does, he's gonna abandon this project.