Based on the demo so far, this game is a great example of re-imagining super-metroid for the modern era. You've managed to improve on almost every single aspect of the game, and brought it into today. How great!
I got to the boss, died 3 or 4 times, then gave up -- It's so tough for a first boss! I could get it down to about 50% health on my best attempts.
I'll be sure to keep an eye on this game! Love it so far!