I like this game so far. It does have room for minor improvements though. I think the length of each day is fine. I find I'm completing tasks well before the next day with a few exceptions. I think there should be less oxygen supply so that you have to refill your oxygen more often. This might make the game slightly more dynamic. Some controls are a bit clunky to me. For extinguishing fires for example, I consistently had trouble putting them out because I wasn't sure where I needed to stand or how exactly I needed to interact with the fires to extinguish them. I know the button was 'E' but do I need to tap the button, or hold the button? The same goes for picking up items and some events. Some events like steering the ship are a bit, and I felt it should take a little longer or be a bit more dynamic. Like pressing different panels or buttons to dodge debris or something which is indicated by red or green lights next to the panels. Definitely something to play around with. As for the enemies, they seem fair. They should shoot a bit more often because I find I'm only have to dodge a shot or two before I take them all out. Maybe give the player's weapon a longer cooldown between shots. Also make it so that the aliens don't spawn when the player is in the room. I found that when I was in the oxygen room, I could take out the aliens as they spawned and they didn't have time to do anything. I can't wait to see what they look like when they are done. Unless giant alien TicTacs are what you're going for, then spot on. The drop rate seems fine. I would say make the interaction button something you can press with the thumb, like Spacebar. This might make it easier to move around and do tasks.
I'd rate this game's difficult a 3 out of 10. That's not a bad thing, because I don't think you're going for anything particularly difficult. I always have a foreboding sense of doom because I know I can't do anything to stop the inevitable destruction of the ship. So you definitely hit the mark with the theme.