Falls short for me.
I consider my ADD to be a fairly reliable barometer when it comes to grading games, and I lost interest in this "epic series" after finding the red ship.
The premise is... "cliché" isn't quite the word I'm looking for, maybe predictable? Overused?
The fact that I'm not a terribly big fan of Rina-chan probably makes me biased. I'm not saying she's a bad VA, I'm just saying I don't think her elocution fit the player character very well.
The music is repetitive and further adds to the monotony and staleness of the gameplay.
As for the graphics, I understand that eye-candy isn't everything, but it shouldn't be neglected altogether, either. This game feels like it was rushed, visually, and didn't particularly appeal to me. I was hoping the story would make up for it, but it was a letdown in that department as well.
The first few minutes is where you really have to hook your gamers, and this just didn't cut it for me, sorry. Points for the map and small tutorial, but it's really nothing ground-breaking or innovative, It feels like a simplified map from a handheld castlevania game.
The biggest thing I would say to work on is appeal. The lack of graphics, the tiresome dialogue and repetitive music killed it for me.