Great take on the theme. I think the bullet hell format really works well with the boss rush theme as a whole - and your usage of the exchange mechanic by embedding it in a roguelite format, found in many modern games, is a great take on this.
I just want to say:
- Entering the game from the get go was a positive surprise and I'm taken aback by the art and sound that went into this. Asset pack usage aside, it is clearly very intentional how it was used and I love it.
- Sound design is exceptional (and very important for this kind of guy) alongside the music. Music is INSANELY good. Props to the composer.
- Only notable thing to highlight is the cursor can be hard to see in this game, especially since its no longer in the traditional top-down Touhou-style bullet hell where aiming doesn't matter. Since aiming does matter, I think there needs to be a better way to aim towards the boss(?). Not sure how that's fixed.
Excellent use of the engine to create a very polished experience. I had great fun from start to finish. Also Backdoor B OP