Hey ho! As I mentioned, I'm also providing feedback :)
I definitely had fun with the game and see the final product as an enjoyable bullet hell game. While it may not necessarily attract newcomers to the genre, it could certainly provide fun for bullet hell/shmup players.
Here is my feedback/bug report:
In the start menu, when you are in a submenu, you can still hover over the other main categories, but you cannot select them.
After getting a game over and restarting the level, all sound effects were gone for me (I think this happens if you press Enter on the game over screen or something like that).
Personally, I find the hitbox of "Cobra" harder to read due to its rearward position and the purple color (as the enemy bullets are also purple).
I found the projectiles sometimes hard to read. I think this was mainly because some rotate and some don’t, and as a result, the non-rotating ones sometimes went unnoticed, but I believe this might be more of a personal issue.
Personally, the music didn't catch me, but that's a matter of taste.
I find the Level 2 background more pleasant to read.
Fun game! I find the pixel art in this game incredibly good, and I love Jin's sprite. He looks very cool, and overall the world is beautifully designed.
As for the gameplay: Personally, I find it a bit clunky. I would like to see 8-way movement and maybe iFrames for enemy projectiles while dashing.
However, I don't know how feasible that is to implement in an NES game, as I have never worked with NESmaker before.
I had a few slowdowns, but they weren't too bad. It could also be due to the fact that I played on an Anbernic RG353V.
I'm excited to see how this project develops or other projects from Video Games United! :)
