I would have given this game 3 or 3.5 star rating if it wasn't for the new species and evolutions of spectrobes. I found the new system confusing at first, then you get used to it over time.
PROS are that this game has new species and evolutions, contains same main characters from original Spectrobes game, has a new story and some new planets to explore, new excavation system and in general.
CONS are probably how confusing it is to actually level up you're newly de- fossiled spectrobes, constant collecting of various gems to feed them, then only stop at LV 28 or so. (so basically you can't feed them up to level 28, instead you have to use them in battles from that point on).
OVERALL this game is just near average, if new to this title, go to buy the original first to get a jist of the basics of spectrobes, of just go straight to this one for the sake of it.
I'D GIVE MAYBE MID POINT BETWEEN 3-4 STAR RATING