With all the time you wait around here for a response you could be building something yourself, He was nice enough to give you a link to a tutorial with a similar style and he said he doesn't want to release a early version, he's building a product that he wants to sell and releasing a early unfinished version may give people a bad idea and also give him a bad name. So i think the best two options you have are either building something yourself or pushing back whatever project you have in mind to a later date, we are all eager to get our hands on the asset but we are all more than happy to wait until RandGameDev is happy with what he has to release.