Great job! I remember your nice song 'FlowerPower' from the Town Music Jam #2, keep up the good work :)
'Speeding Spaceship' is delightfully goofy, perfect for a casual travel theme without enemies!
'Shooting Stars' feels like an enemy-filled base alright! Starry, bass-y, yet still a bit goofy, nice!
'Space Sailor's Dream' indeed has something of a boss-introduction, the low synth working really well!
'Wish to be' first doesn't feel like a boss more than 'Shooting Stars' does. But the rapid notes and beats do make it feel like a boss, and as it continues (especially at 1:18) it starts to feel more and more like a boss!
Overall, all your songs feel 'starry', and all songs fit the themes they intend to well. Well done!
(And plus-point for making the songs loop!)