Hey this is a great game!
Some feedback would be the middle section with the spikes was a bit dicy for me. Perhaps the checkpoint could be after I pass through the first spike. Also I thought the bouncy thing was a new planet. I didn't get to the end but if you don't have it already have an area where there a few planets / moons and you are using their gravity to reach the next platform .
Additionally, coloring the tiles differnet colors as you get closer to the sun would look cool. Like a venus section, mars, earth, etc...
I loved the gameplay.