This game was very good and very well made, and no doubt deserves a good score. On the formal aspects I got nothing to add (sounds, music, graphics). However, it was also a little disappointing to me (and, judging by the other reviews, others may feel this way). I liked the other Sentry Knight games a lot, and I was expecting a tower defense type. Instead, this one felt more like a "bullet hell" type of game. Also, the spells options feel a lot more limited than before.
Now, I'm not criticizing the search for innovation. For example, the rescue of pets during the progression was a great and fun idea - not only for the upgrade itself, but the anticipation it generated, got gamers wondering which would be next, and its power. Many successful gaming series change a lot over time, but the sin here was becoming more action than strategy I think. A sudden change in the game type may catch fans off guard.