It took me a displayed time of 02:33.15 and I found 40/47 items. I also found the 2 spots where you get stuck. The only ending we have access to is cool, I like the game that way unkind to the player ;) .
I enjoyed the game a lot! The presentation is top notch, all the visuals, sound effects and music, I love the music. It controls pretty much perfectly including all the extra abilities you get. The rise in power is real and getting immunities to spikes and liquid feels specially great. I like that they're a few parts you can access sooner than you should by bruteforcing, such as the first? damage reduction item. The difficulty is perfect for the jam and I'm super happy it's like Metroid rather than Symphony of the Night (no EXP), I like that kind much better.
I'm not certain you can access the relevant abilities in a different order than a predefinite one, unless jumping then using the shield allows you to but that's the one thing I had a lot of difficulties controlling (at some point I think I had to because I was stuck between an orange door and a chasm to chase a star).
Great one!