When I first saw RENNY Blaster it was my friends copy, I had never heard of it or seen any screen shots or anything. I found it instantly terrible. He agreed.
Now with the help of the Internet it's easy to see a lot of the game at once, and clearly the design work is many levels beyond what the programmers could keep up with. This is not totally unheard of in games (and anime) of this period. Think of the ratio of design to gameplay that exists in games like Valis or Linda3, only three times as bad. This is similar to anime OVAs where there was only enough budget for a 30 min show but enough ideas for a three hour movie; Appleseed, Outlanders, that sort of thing. I feel bad for the designer, doing all that work for a game that nobody likes and only slightly more people were able to find. I'd assume most copies are in the hands of completists who have never played it by now.