Get it on sale. Mediocre but amusing. This is a decent game hampered by a few annoying development choices. . The level design gets repetitive, your enemeis (aside from the few bosses) are uninteresting or dangerous and you'll spend more time being talked at by your priestess waifu than you will playing the game. There's a LOT of talking and exposition in this. A LOT.
Most of the puzzling involves shooting a target or enemies with the appropriate type of ammo that you find in each level. Shoot the right ammo at the right things, door opens. New room with the same goal. There are a very small number of enviornmental puzzles that involve other mechanics, and those were enjoyable.
The small number of boss fights are the highlight of the entire game and seem to be where most of the creativity went. I really did enjoy those moments.
But everything in between struggled to keep my attention and having your loli priestess compainion rambling on non stop only served annoy me than give me any sense of backstory or narrative.