Thank you for updating that! I was able to play it with no problems.
Overall I think it's a solid little CAVE style STG. You have all of your fundamentals down super well, which is a great thing to have in a world where CYGNI and Raiden NOVA exist. One thing though, does the game have proximity damage(You do more damage if you're right below an enemy, like DDP)? I don't know if it's particularly necessary but that's one of my favorite mechanics in the entire genre, it's just so fun to do. Anyways, I think overall the bullet patterns are solid, even if stuff like the spike balls or that last boss are a little bit hard to read. I'd suggest placing the spikes in a way that sorta telegraphs where they're going to shoot and not have the final boss teleport instantly. I think the "bomb" mechanic is kinda interesting, reminds me of Milestone shooters like Radirgy and Karous. The graphics and sound need some more work but given this is such an early demo I really can't fault you for that. Good job anon!