Unlock best ships

How do you unlock best ships? Im on 3rd level of hard mode and now would be a great place to have them lol

You get experience by playing the game, commander! If you want to get experience more fast we recommend playing exactly the hard difficulty level.

You can see your experience bar in the score screen once you die or complete the game, it is at the bottom. For each new level you acquire you will unlock a new ship!