Weltall Zero
Member
Using the default. Should I play it on easy to unlock ships?
You should play on Easy until it's no longer a challenge. Even on Easy the game is quite hard until you get the hang of it, it will probably still take you quite a few tries to finish it. Playing on Easy will give you a better grasp on its fundamentals without the much less forgiving resource curve of Normal.
Also, you might find this helpful:
http://www.neogaf.com/forum/showpost.php?p=45775649&postcount=1191