Updated UI and throw works like a boomerang

Hi all,

I've updated Picokaiju with the following things:

• Intro screen now also includes "Pico" in japanese, which was missing in last update
• Abilities UI is now updated with more information for each ability
• Throw ability has changed and is now gained from start. Each time thrown object hits something, it changes direction CCW. It is possible to catch the thrown object again, given you've upgraded throw strength to 4x.
• Command hints for O and X pop up when you're not doing anything.
• Ramp for leveling up is now less steep after 13500 xp making it a bit easier to gain more power ups in later stage of the game.
• Added some bars to the in.-game music and changed one of the instruments to be more pleasing to the ears.
  
   
  
  RAWR!