Update 0.20! (new skybox, fireball changes, finished music etc.)

Changelog:

• fireballs that are spun now become iceballs, which can be used to freeze enemies/npcs
• fireball now spawns faster and the animation has been sped up to match
• fireballs cooldown has been lowered 
• fireball can now be used while gliding 
• fireball now destroys itself after a certain amount of time 
• diving onto things that are divable now causes you to bounce upwards and restart your dive 
• added proper skybox 
• added proper end to song 
• fixed another texturing error in the cave 
• adjusted a couple textures 
• adjusted shading in some places 
• adjusted some geometry throughout 
• added missing snow/grass overhang geometry where needed 
• added some breakable ice walls in parts of the cave area 
• lava no longer insta kills you on easy/freeroam difficulty 
• enemies now insta kill you on hard difficulty 
• knockback from taking damage has been adjusted to allow more air control 
• dying 3 times no longer kicks you out of the level and back to the main menu when not in a time trial or while in freeroam mode -added boot up screen

Enjoy!