Ah, this game. I remember reviewing it a while back, and I wasn't particularly keen on it back then either.
It's got some neat custom enemies and gimmicks, and it's very solid as far as aesthetics are concerned (probably because 99% of the graphics here are from Jelly Boy 2 on the SNES), but the level design is just really forgettable all round.
I mean, not only are they super short (to the point they make Super Mario Bros 3's levels look packed full of content by comparison), but they're all usually insanely linear (with few secrets or side paths) and are filled with enemy placements which are just there to fill space rather than challenge the player.
Add how there's literally zero replay value (there are no secret exits at all from what I remember, and Yoshi Coins don't exist), the bosses are just stock battles with no difficulty curve to them (seriously, they seem to be placed in the castles at complete random) and the difficulty level here is usually nil, and you've got a game which basically acts as a very fancy tech demo but not much else.
Which is kind of a pattern with this author and his associates. Toad's World was basically a tech demo too, and the Panic in the Mushroom Kingdom games that was inspired by were much the same.
Either way, I'd REJECT
this. Games should be featured based on their game design, not just how they look and sound.
For gaming news and Wario discussions, check out Gaming Reinvented
and Wario Forums
As for Mario's Nightmare Quest? Well, it's currently on Fusion Gameworks, ROM Hacking.net or the GCN at the moment.