I hate having to give star ratings for games. Your own likes and dislikes are going to give you a much better idea of if you like a game than if some random schlub on the internet thought it was worth x out of x arbitrary units.
Anyway,
First off, most of the graphics and animation (with the exception of one or two locations) are absolutely gorgeous. The music is servicable, but I can't say it really stood out to me.
Movement and controls remind me strongly of megaman, and of course it's lathered thickly with heapings of metroid and castlevania games. There are lots of weapons, accessories and items and some light RPG mechanics which don't get too much in the way.
There's a lot you can get into in this game if you choose to - lots of story and lore, extensive mechanics and levelling, lots of secrets etc.
But none of that feels like an obligation - you can just breeze through the game and let the levelling etc. take care of itself and only scan the story text and still enjoy it. Or you can spend a lot of time minmaxing your equipment, optimising your loadouts, finding every single secret and getting deeply into the story.
While we're on the topic of story, it's surprisingly complex with multiple facets and nuance. Mileage may vary, however - for what it's worth, I thought it took itself a bit too seriously.
Overall, there are worse ways to spend 5+ hours if you are hankering for a metroidvania.
