Fourth weekly update

Finally completed the unlock system.

Now most equipment needs to be unlock to appear in the game.

To unlock an equipment, you need coins and done all required task like destroying enemies.

These tasks have not been implemented yet.

Now you can check equipments effect in the unlock screen.

Bug fixes:

Fixed the bug where you cant start the game when closing the setting menu (very sorry).

The music and SFX volume will now be saved.

Moved the tutorial button to setting menu.