Nice work! I think the mood and atmosphere of these tracks is really nice, it somehow feels both calming and adventurous. The third track almost gave me Steven Universe vibes, which was really cool! 5 might be my favorite because it sounds so mysterious, it’s perfect for a desert setting and those are often my favorite themes in video game music. The last track felt like a really nice finale as well. Even though the genre of your hypothetical game is a shooter type, the OST sounds kind of cozy :)