I really love the main line the melody has on the very first track! Groovy and talking so much ^^ It conveys the not serious approach very well! I think the sounds you used help in this way. Second song gives this same light-hearted feeling while being more playful with that funny sound. Great for sailing in space! Then the last one so funky and yet smooth at the same time! It is joyful with the melody kind of singing thank you for the adventure. And those synths in harmony at the end are so good!
Amazing job overall, and the main force of this ost is its strong identity in my opinion, it is an important point for memorable games! Congrats and thank you for sharing this so cool work :)