(I mention a few bugs below, so if it helps: I'm on Windows 11, playing on Chrome!)
I'm pretty conflicted on this one - one on hand, I love the presentation. The color scheme, animation style, character designs, and even UI tapped into that classic Newgrounds style in a way that works really well. Plus, the soundtrack was super catchy and matched the game well.
The game itself, though, is pretty rough. Starting at the menu, the sliders in the Options menu don't work - it doesn't look like there's a way *back* to the main menu from there, though, so it doesn't make much difference anyway. The buttons were hard to press, too. The best solution for this is to use an invisible rectangle to serve as the hitbox on the frame the button art is on. That way, the user isn't struggling to get their cursor right over the letters.
Kwing already summarized the things I'd say about the gameplay and camera, but I'm more optimistic about the bullet moving in the direction the player is facing. That made me smile, and it could genuinely work well as a game mechanic if the levels and enemies are designed around it. Maybe that could be a unique feature going forward! You could probably do some really cool stuff with that.
I saw you mentioned a new engine, I hope you go ahead with that. As rough as this is right now, there are some cool ideas here, and it seems like a lot of love went into it. It just seems like a victim of a deadline, and it'd be a shame if that's all that comes of it. Good luck going forward!