So let me get this clear: I f***ing love this series. But sadly, this isn't a very good adaptation to the anime/manga. :c
Visually, this game looks really good for N64 standards! It looks very crisp for the time.
The audio is very good as well, even though they sound really MIDI! they did a pretty fair job on recreating the anime's OST for the game. However, I do have some complaints.
The controls are quite clunky to say the least. (it could be because its the EVAs are giant to make it more realistic, but it's just too clunky and slow for my taste.) Some attacks are very delayed, and because of that I couldn't even get past the first Angel!

The story- well, its NGE. whaddya expect? (I loved the story to the anime/manga, but the game seems very lacking considering its a beat 'em up.)
The depth: well, I don't really know how to explain it! Its just a beat 'em up adaptation of NGE so there's not much to expect.
Like I said before though, the controls are very clunky and that's why the difficulty is so high on this. 

overall I say this game is at least worth a 6.7/10. It's at least worth a look, who knows, you might even like it even if I didn't! (don't let my review change your opinion! i'll definitely be practicing on this game so i can hopefully get through the first Angel someday. ) 

also! if you'd like to take a listen to the soundtrack for yourself, a nice fellow uploaded the OST to the game!
https://www.youtube.com/watch?v=3pmQypqxPuY&index=1&list=PLuaLlvFVruhlJDJde2pDe_BX1a040TLMM

While you do master the basic structure of a review, you should consider going into MUCH more details in the future. How do the graphics actually compare to other N64 games? Do you have other complaints about the soundtrack other than its MIDI sounding? What about the story? I've never played (or even heard of) the game, so it would have been nice to know about it.