Nah, no worries dude, it was a joy reading your feedback. I was very passionate about this game about 10 years ago which is why I know all these things. Then DX came out and I kinda walked away from this one, viewing it as more of a tech demo of sorts leading into the DX version.
I did notice just a couple more nitpicky things on a second glance.
1. Mirea's level 2 power up seems to be missing. Her projectiles don't gain more damage or change visually on each level up like Sachiho and TGO-03's do, she just gains an additional one per level. Level 2 gives her the upwards angled additional shot and level 3 gives her the downward one (which you have correctly implemented).
2. Enemies heal at a fantastic rate when digesting a character. So much so that if you're trying to save Sachiho with Mirea and only her level 1 shot, you're going to have a tough time out-DPS'ing her heals.
3. Escaping a grapple is not a random chance each time as you've implemented (though I do kind of like this change). In the original, it ALWAYS takes EXACTLY 10 button presses of any combination of movement, jumping, and/or attacking to escape. You do have the HP cost of each button press down pat though.
4. Lamias have a very small chance (~5%) to drop an HP MAX upgrade upon defeat. You may have already implemented this, but I didn't farm them enough to find out for myself, so I'm notifying you here just in case.
NOW I think that's everything haha.
If you want some more help or information, I do have the raw original java files if you care to decompile them.
I also have my own footage I recorded of a playthrough back in 2015. It's only ~6 minutes long, but maybe it has something unique in it compared to other vids.
Keep up the good work, mang