Why was this game an unmitigable flop on every platform that it was released on?

VJ was released in a time where some reviewers were actually good at games and it's much more of a simple game than W101 is.

In a way, fpbp. The visual identity of the game isn't strikingly attractive on the shelf, it's not notably stand-out, and doesn't make it easy to understand kind of game experience you're getting into. Additionally, for those who do actually take a dig at looking into the game, I feel like there's a possible separation between those who'd like the look and those who'd like the concept of such a complex action game. Then there was the Wii U demo: if I remember correctly, that initial version didn't have the intro cutscene and tutorial or necessarily the entire first operation. It's been some time, so I can't say if that was the case for sure anymore, but if it was, it didn't make for an exciting representation. The new demo is much more generous and really sells the humor and style of the game, but that alone isn't really enough to stand on.