Diehard shooter fans might be disappointed by the games other gameplay restrictions, while classic gamers may be turned off by hectic amount of enemies that often charge at you. I guess if you're into 80s classics that are difficult for the sake of being difficult, you'll probably enjoy what Thexder NEO is pushing (and hey, it's only $10).
Ultimately, Thexder Neo has no point. It's a below mediocre shooter that shouldn't have been brought back if the developers had no intention of improving it.