Nice game!
I liked a lot the idea of controlling a spaceship and having to get out of it to pick some crystals.
The graphics are simple and nice, it really brought me the feeling of old school games. The SFX suited well with the graphics and atmosphere. But I think that the volume could be lesser, to level with the PC's volume.
The gameplay is ok. I felt uncomfortable with the visible area when moving in the stage. Sometimes I couldn't see the enemies comming and I died without being able to react. My suggestion would be to make the camera follow the character more at the center of the screen.
It's a very cool game. Congratulations!!!