Well, as I was kind of implying, I'm not anti-Gyrostarr per se; I think the concept is great and I want to see a sequel. However, what's here now is really wounded by significant flaws, mostly in the realm of framerate and lack of anything resembling difficulty, and that pushes it into the realm of "Decent enough, but there are probably at least twenty-five VC or WiiWare games you could get for 700 or less that would be more enjoyable."
Just to name some, River City Ransom, SMB1, Zelda 1, Kirby's Adventure, Zelda II, Adventures of Lolo, Bubble Bobble, Star Tropics, Adventures of Lolo 2, Fantasy Zone, Super Star Soldier, Soldier Blade, Military Madness, Dragon's Curse, Blazing Lazers, Galaga '90, Neutopia, Neutopia II, SMB: The Lost Levels, and Defend Your Castle.
And that's only sticking to games I actually bought--I'm sure numerous people would recommend SMB2 (Doki Doki Panic), Ninja Gaiden, Ninja Gaiden II, Super C, Pop, and others. Shoot, just last week people were saying Bio Miracle Bokutte Upa is a great NES import platformer, and this week they're saying so for SMS' Alex Kidd in Miracle World.
Of course, all of those listed except Defend Your Castle and Pop are VC games, so anyone's enjoyment might be contingent on not having played them--but strictly in terms of quality, certainly I'd put them all ahead of what I've experienced of Gyrostarr so far. (And I haven't felt the urge to play any further than what I did, either. :/) Also, might as well mention it... If a person was willing to spend 800 instead of 700, practically a new world awaits. Obviously nearly everyone knows what SNES and Genesis have to offer, and TGCD has Gate of Thunder and (preferably) Lords of Thunder just waiting to rock people's faces with true shmup action.
So... yeah. Decent, not great--and not worth it with so many other great games around.