I couldn’t figure out what I was supposed to do. The alien flies very slowly, and the ship looks like it has heart shapes that need filled, and I found hearts in space, but I can only bump into them and nothing happens (I tried all the keys to get something else to happen). Music is very repetitive, which is noticeable because there are no other sounds happening.
I think it would be good to include some hints as to the gameplay/controls, so that people who run Linux will be able to play it.