It's hard to believe this is the first GBA Castlevania, because honestly, it feels better in every way to it's successor.

An Igavania not made by Igarashi, Circle of the Moon brings a lot of great stuff to the table. A map that is fun to explore and look for secrets, beautiful spritework on all the boss fights, EXTREMELY satisfying movement after getting one movement upgrade or two, and overall a short and nice experience, not too hard nor too easy, as all Igavanias should be. The spell system is also another great thing about the game, even though the randomness of the drops may be a little frustrating.

My only complaint would be the fact that the game areas are not that visually impressive and may look a bit samey, but overall, a very good game.