Hard but fun
The game is hard but it gets easy as you get better ships.
Heres some tips for beginners:
1-Set your difficulty to easiest (don't worry, its just to get more money)
2-Buy a level 3 or 4 vulcan and a level 3 generator
3-Do level 1 as many times as you want, accumulate money, get a strong ship
4-Do the other levels on normal difficulty with your improved ship
5-Buy a level 5 laser beam if you have enough money later on
Survival Tips
-Beware of missile ships! They can kill you in one hit
-Don't collide with other ships, that kills you, too
-Do level 1 many times if you need cash
-The vulcan is the best starter weapon, use it
-Don't buy drones, they waste energy and aren't very strong
-Don't buy a weapon that your generator can't handle!
Hope these tips helped