This review is based on the original jam version + the changes made to the game so far.
The title screen music is so catchy, I could just sit there and listen to it for several minutes. The in-game music is also very good.
The graphics are fine, the enemy sprites are all recognizable Touhou references, especially notable since I played Mystic Square recently.
The concept is funny and I like the idea of Sanae being the one to go to Makai this time.
I'm not a huge fan of arena shooters. They often feel repetitive to me and this game ends up that way. It feels like you're just circle strafing the whole time while firing into the enemies. The mini-boss every 10 waves changes things up a bit, at least. It would be cooler if the enemies had a greater variety of attacks that played off of each other.
The weapons are mostly straight upgrades of each other. I ended up using the minigun the most, and using the gohei to take out big enemies once the smaller ones were dealt with.
There seem to be almost no iframes when you get hit. This means that if several bullets hit you at once, you can go from full health to game over before you know what happened.
The game sorely needs a mouse sensitivity slider in the options. I had to mess with my mouse settings to get it to a level where I felt comfortable; the default sensitivity was much lower than I am used to.
When I tried the story mode, I was able to see the opening cutscene but it never went into game for me. I assume that's related to the "buggy" label it's given in the main menu.
The LGBT themes are present (Sanae is implied to love Reimu in this game) but not really represented in the gameplay past the opening cutscene.