time for another patch!

Patch notes:
Added a new ability: fire walk, now fire spawns behind you when you walk and damages enemies
swiftness: now you can move faster
armor: take less damage
blizzard, falling ice will slow enemies
skills:
now you can reroll 3 times when selecting a skill
made the skill system more random, now you will see the same upgrades less often, making more variety
added meta upgrade system
added achievements
set up random map generation, randomize your playthroughs!
finetuned the amount of enemies spawning
added sound settings
fixed a bug where you couldnt unlock new characters
fixed a bug where camera would go outside of the bounds