This was fun to play. The music is not bad and the graphics are very cute. I loved the incredibly random array of things the alien met along the way--it reminds me a little bit of Katamari Damacy.
By way of constructive feedback, I would make three recommendations:
1. More health. Dying in one hit is very unforgiving.
2. A slightly faster move speed. The spaceship feels a little sluggish.
3. Some sort of ability in addition to movement. That would spice up the game play.