It's worth playing through on a flashcart, but was disappointing as a Zenki and SNES fan, especially after having already played the PC-FX game. It feels like it was a budget project by Hudson and the team really phoned it in to get it done fast. Gives me a similar lackluster feel that Valis IV PCE does. What sucks is that like Popful Mail SFC, there a bunch of cool tile artwork, but it's put together in a way that makes to feel overly repetive and bland for the most part. Some of the background layers have ridiculous vertical scrolling and artwork-positioning combos that kill the effect and the boss battles suffer from excessive mirroring. The final boss scene and stage in the clouds are great examples of the potential the game had.
If you like this game, you'll love Kishin Douji Zenki, which is pretty much a SuperGrafx game with PC-FX background enhancements.