Great, thanks for the new demo!
Spoilers / feedback:
I died several times trying to get through without oxygen before I realized that you can pick up the helmet. Also I noticed that the UI keeps explaining controls like "A or cross" but the button was actually square, and "X or square" but the button was circle. I'm using predefined control scheme 1. I finished the demo well after the "end of demo" text appeared after the first boss. I defeated two bosses, 27% map completion, and 9% item collection rate in 50 minutes. I explored 8 discrete regions in total. If I had to guess, I probably missed some items in the first area prior to the escape sequence. I also admittedly did not explore with the charge beam after collecting it, but I'm not aware of any doors that it could have opened. There were at least two items in tiny spaces which I could not reach. I badly wanted a way to jump higher so I could reach a few new areas and also return to the first area.
I had no major issues with controls, performance, or bugs. I did find myself wishing that the minimap would scroll to the new room as soon as I entered the door, instead of after the new room loaded and appeared on screen. Also, when you let off a charge shot and begin charging another shot, an extra normal shot is fired in between. That extra shot does not feel good. Also, when you land on the ground and jump immediately, the "landing" and "leaping" animations play in midair which does not look great.
Thanks again for the cool new demo. As usual, the graphical style is gorgeous. I love all the vibrant colors. I look forward to the game's release! I might have to run through the demo again to make sure I didn't miss anything!