For the run-of-the-mill Defender styled shooter, Nuclear Plant 2 is sound and forward. With the survival now on the moon, the player's improvement of life comes in the form of new drops. Acceleration and Freeze allow more battle flow control; this allows researching, healing, and evasion feel more practical. The artwork and ambiance are very fitting, subtle tones and deep contrast are used. Personally this gives the game longevity as you always know where you are. Definitely a worthy sequel.
However my ratings come from the skills and time as an experience game player. Memorable events and being able to alternate how you play becomes more important to these kinds of players. Simply puts, these traits round to innovation, thus players will just want more. Newer and more casual players should get good mileage from the game. I do recommend these players to try Nuclear Plant 2.