The Saturn is a 2D powerhouse. If you're looking at buying this game, you already know this.
And the strengths of the system ore on full display here. The graphics hold up. If you like 2D sidescrollers with large sprites and amazing animation, you'll probably like this game. The folks that made it went on to do Muramasa on the Wii, another game with amazing graphics, art style, and animation.
It is, however, pretty pedestrian when it comes to gameplay. mash button until enemy is dead. Toss a dagger if you're having trouble. Eat an apple if your health is low. And so on. It's enjoyable enough to go through the game -- there's nothing wrong or broken with it -- but it does wear thin after a while.
Still, you are a PRINCESS dammit a PRINCESS and you are slaying demons and goblins and all sorts of horrifying enemies in a quest to become the most powerful bad-@@ little girl on the face of the PLANET and this should be enough motivation to keep you walking from one area to another, saving townspeople and collecting items and eventually restoring peace to the land.
Warning though: It's in Japanese. I don't know a lick of Japanese and found it to be OK anyway. No idea what's going on, plot-wise, of course, but at least the game basically makes sense -- it's intuitive to play. Plus, this is 2016. If you're stuck, everything is easily resolved using free online walkthroughs.