The game is a bit fun but it feels like there isn't much the player can really do to win. As a previous commentor stated, everything is random; spawns, stars and the alien. I've won ~50% and it feels as though each game goes through these 3 goals: Find star with highest score, block the alien and lastly decide to attack alien.
If you spawn in a corner and the alien is in the middle you are often screwed since the alien will have more options and be able to block you out.
If you spawn with low value planets and the alien doesn't you lose since you can't scale.
Even if you decide to attack perfectly and block out the alien it doesn't matter if the alien can get higher score before you can and the opposite holds true too.