More UI

With upload of v2, I created some more UI screens. One of which is the level select screen, which lets you choose between the levels you've already played and the ones you have yet to complete.

Each level will implement 3 goals, 2 of which are static (complete the level and complete without taking damage), and a changing 3rd goal.

These goals, once achieved, will grant a special resource which can be used for upgrades outside of the EXP upgrade screen.

These upgrades will upgrade the ship's hull and bomb abilities -- these upgrades will affect them both differently but the upgrade tier will be the same no matter which selection you've chosen.

For example, if you upgrade hull to level 1 then for ReIN hull you get an additional health, but for ReflX it lowers the time for a shield by 5 seconds, and for Retr0 it increases the stats boosts.

TO DO: Align the HUD properly, fix bugs (Miku Hints not appearing) (Level EXP and enemies killed not tracking properly), complete save system, and complete level designs. Need to create the hull mechanics and bomb mechanics.