Dungeon under construction: furnishings and initial dungeon beautification

Following the initial launch, the next step of prototpyping is making it feel 1) more like a game, and 2) more like a dungeon. This is to move past the proof of concept of the gameplay and onto the proof of viability of the setting, art, and ambiance, as well as the project's structure as a game. Current music are placeholders only and are there to guide development.

Features added are:
- Menu Screen
- Hub level with level dressing
- Music for ambiance and mood
      - Disclaimer: Music is lisenced and are currently placeholder only

Features and changes from comments and suggestions:
- speech bubble above the player through the speech bubble instead of at the bottom
      - This removes the need of mannually clicking on the input box below and also opens up some new, exciting possibilities for the future

Other changes:
- Changed the levels to loop from the hub level to level 1 as the other levels are bare*
- Changed UI color of the spell list to be brighter and more paper-like 

 Fixed bugs:
- Aiming now works on different levels

Known bugs:
- Door usage teleports you elsewhere in the map
- The prompt finder at the bottom of the screen is not yet connected to the speech bubble