(Temporary)
Title menu
|--Start
| |--Arcade mode
| |--Explore mode
| |--New game
| |--Continue
|
|--Options
| |--Music volume
| |--Sound volume
| |--Fullscreen/window
| |--Difficult (Only works at arcade mode) : Easy, Normal, Hard
|
|--Exit
Arcade mode : you have 2 lifes and you have to beat the whole level without continue.
Explore mode : have main storyline and side missions, complete side mission will give you upgrade mod that you can upgrade your ship, level up your weapon power, shield energy, ship speed.
I want to add what I want but there are lots of things to do, I just have not enough time to make everything perfect.