Thanks for trying the demo. :)
So.. yes, I'm basically trying to make super metroid but not super metroid at the same time, more things will likely change at a later point in time to differentiate the games more but it will always look / feel like super metroid.
Just wanted to give some more clarity on that subject.
Atmosphere is a pretty big deal for me which you've probably noticed. ;)
Yep, you're pretty much correct about the oxygen part.
I've gotten this comment about the boss a couple of times now, regarding that the flies do not drop enough stuff, so this will be addressed at some point.
I may look into the boss health as well since I know the fight can get long if it gives you the wrong patterns.
And you're pretty much right about the missiles as well, I don't want the player to have a large amount of missiles (ie: be overpowered) therefore the upgrade(s) only add 2 to maximum missiles.
Which in turn will hopefully force the player to use the standard beam weapon more later.
Anyway, thanks for the feedback and glad you like the game. :)