I think it's overrated
This is a nothing-better-than-average fighting game. These are my the reasons I don't like the game:
-The arena is boring, not only is it very very small, but the graphics are also very boring. There's only grey, I know it's the NG layout color thing, but it's kind of boring in my opinion.
-There are too few movements. There is only one punch-button, and you can jump and throw bombs. But I don't think that's enough, in NG Rumble you had two punching-buttons which you could click in different ways and "sequences" so that the character performed special attacks.
-The story is, well, there is none. Only "defend the portal"... This can work, but a little text would be enough from the way I see it.
These are the things that make me like this game:
-The characters are funny, and kind of colorful.
-The animation is fluent and awesome, the flash that comes every time you hit or get hit is a good "instrument" (that's what the dictionary translated the Norwegian word 'virkemiddel' into...).
-I don't know, it's professional and the sounds are cool.
Not bad. In fact... I like it!