Now that it works, I can review it...

When I first downloaded this I couldnt play it because the prior version (1.0.2) didnt work with iOS 6. But the new version (1.0.3) does work as advertised (at least on my iPod Touch 4th gen running iOS 6) so now that I can play it I can say its indeed an arcade-perfect port of this great Taito game in almost every way-my only complaint, albeit a near-big one-is the controls. The finger-swipe for movement is hard at first and I wouldve much preferred a D-pad or virtual joystick controller as the movement isnt as smooth as in similar Taito iOS games (namely DariusBurst SP). Oh, and dont play Zoom mode on anything but an iPad, it makes the screen size too small. No such problems in Original mode though. As far as frame rate and the like, on my Touch 4 it runs perfectly with no lag or delays. And Im also happy that the solid ZUNTATA-produced soundtrack is intact.
As long as the control issue isnt make-or-break it otherwise is probably worth $6 while its on the half-price sale (if I wasnt a big franchise fan I wouldnt otherwise have paid more than $3). if it goes back to regular price (probably $12 based on advertising) then I would stop short of recommending it unless youre a diehard fan of the franchise or Taito games. Now if a future update were to implement a better control setup Id probably up my review from 4 stars to 5.

DCRage about RayForce