Muramasa has fantastic animation, large sprites and bosses, and lots of enemies on screen. But the thing that really makes it stand out is the variety of its imagery and its attention to detail. You'll go from a foggy forest to a paradise-like beach, cross to a series of rooftops, then enter a Japanese mansion. The backdrops aren't just static scenery either. They have such layered depth and movement that they really do look like paintings come to life.