S7 is a shooter RPG where your goal is to kill everyone else (?)
+ Nice music and visuals
+ Green AWP
4,700 HP
329 Armor
201 MR
1 Shot 
Infinite ammo 
Cost 0 money 
Has Big hitrange
Cooldown is only
second too
It costs 0 Mana
- No ending, only beginning
**PERSONAL OPINION**
I think the premise on the game is quite mainstream, which is a good sign because you are able to get players of all ages interested and enjoy this game. I also like the face that you use the setting of aliens and humans to drive the game's environment and story, however, I feel like this is insufficient and unrealistic based on the statistics of the number of aliens vs humans in existence; It will be a near impossible scenario where the astronaut will end up the situation described on your game.
However, do you know what is possible? Switch the number of aliens and the number of humans on the spaceship. Not only it is more statistically correct but it also opens a new premise and a new way to play the game.
Now imagine if the aliens can shapeshift into humans. The humans know there is an alien onboard, so they will need to kill the alien with social deduction since the alien now looks and feels like a normal human however it might not be able to communicate as well as one. Since the alien is pretending to be a human, we might also call the aliens "Impostors"
The humans will have to go through their day to day, however the aliens have to ensure their survival by killing the humans. The impostors can sabotage the humans tasks or straight up murder them. The humans on board will of course be away of this and be able to report the body, where they need to find out who is the killer (which is most likely the impostor)
The humans will have to vote on a member of the crew to eject and kill. The result of the vote will be based on social interaction and deduction which will turn the tide for the humans, or it will aid the impostors benefit.
Sounds fun right? I think I know the perfect name for a game like this, its called "AMONG US". Feel free to email be if you are intrested and we can work this out, cheers.
jng