Hey well done on subbing,
Your game had easy to pick up and intuitive controls , you know quite quickly what to do. Took me a little while to find my ship though.
the clear wasn't all to clear to me until I read the description, so maybe one way to better tie in the theme given is to add a little bit of narrative exposition at the beginning of the game or during the game.
The sound effects gets repetitive quick so one way to reduce this is to randomly shift the pitch of the sfx by 5-10%. it's subtle but does a lot :)
Good job