It's such a cute game! The music is wonderful, though there are a few adjustments you could make with the quality. I'm not an expert with music, so I can't really help with that, but I love it otherwise. Sometimes I open the game up just to listen to the music! Even though it's just the demo, I'm loving it so far, keep up the great work.
The art is great, even though there are a few anatomy mistakes. The space background is mezmerizing. I love the colours that you chose, it definitely adds to the "spacey" look!
I loved Leo's little ending. It was really cute and made me ship Dango and him REALLY hard. I hope to see the finished product, this is really cute and I hope to see more of your work. Keep going! :D