First of all, congratulations on how much music you managed to write in a week! Regarding the mix, I would have raised the volume a few dB because the tracks sound a bit low.
As for the music, I must say they are very fitting for a video game: minimal and suitable as an exploratory background for the player. Many missed this detail and focused more on the music itself rather than its purpose. Your music, on the other hand, would fit perfectly in a game, as they don't have too many distracting elements.
I think everything works very well, I must say. Nice submission 🙂