As someone who's a massive Mega Man X fan and a big Touhou fan too... this didn't exactly do it for me. I don't know if this is something I can recommend to either Mega Man X fans or Touhou fans, and it's definitely a hard sell for any platformer fans.

I think the level design is mostly bland (a lotta flat paths of just dashing through) and doesn't have much to offer other than the enemies that you can fight against. The level structure itself doesn't feel nature and looks a lot more like blocks placed in thin air rather than natural environments that brush through Gensokyo. The enemies just felt like the only challenge in these levels, because the dash never felt like it wasn't put to good use, and the level design was hardly engaging in most situations. Just about every regular stage has these issues, and the only stage that was interesting to me was the Shining Needle Castle stage since it had a gravity flipping gimmick, but that's it, and it's all that stage had that was interesting to me.

The bullet hell stages suck! I think they're a drastic genre shift and too hard to be put into a game that's primarily a platformer. Junko's stage especially frustrated me to the point where I had to turn off the game and take a break for a day, and I usually don't get frustrated like that. I don't think genre shifts are necessarily bad in games (Yakuza 5 is arguably a good example of doing it well), but they can't be too difficult. I get it's a reference to the mainline Touhou games, but as someone who came into this expecting a platformer and am thrown a curveball like this, a genre that I'm hardly even good at, it's frustrating. It's not like it even appears much. It's in 1/7 main boss stage, and it's the 2nd fortress stage.

The music isn't that great either, honestly. I'm someone who actually does make SNES music (using real hardware... subscribe to my YouTube channel "Hooded Edge" lmao), and this did not cut it for me. It felt like the composer was going for a style similar to that of Mega Man X2 / X3 (soundtracks that I think had major flaws in their instrumentation), but it suffers from basically using 2-3 of the same samples for most songs. It also sounds very much like MMX midi-slaps rather than actual SNES music. Songs sound like there's hardly any real depth to them, and they have to use. As not only a soundtrack that fails to emulate the classic MMX music, it just does not sound that pleasing at all and fails to understand what made classic MMX / SNES music great.

On a positive note, I think the art style is pleasant. I love the graphics of the SNES Mega Man X trilogy, and this feels almost in-line with those games.

The shop system is nice too. I think having the currency be handled more like how Mega Man 8 did it (more like collectables that you can spend rather than regular currency) alongside with it being an unlockable from bosses is a really great way to encourage exploration (which there isn't much tbh) and upgrading Reisen's abilities. Although, I didn't think most of these were that difficult to find, some I remember being in plain sight.

The controls also feel good. Nothing else to say here.

Adding an easy mode for players who aren't good at platformers is really nice too. I'm a sucker for accessibility whenever its added (never necessary, but mostly appreciated), so its nice to see players of different skill levels be able to experience this game.

Lastly, the bosses are easily the best part of the game. Their patterns not only match that of their mainline Touhou game counterparts, but they fit in well with the MMX-style gameplay and feel incredibly unique. Yorihime is probs the only boss I didn't necessarily like only because she can instantly heal herself, and Reisen cannot interfere in any way.

Overall, I think this game is somewhat mediocre. It's a game I find hard to sell to Mega Man X fans if they're looking for something good, and Touhou fans will primarily be there for the music and characters. Even as a game on its own, it's rather both boring and frustrating with the bland level design and frustrating bullet hell sections for those not good at bullet hells. Perhaps you'll enjoy it more than me, but I found myself underwhelmed by the end of this adventure.