v0.0.5A Progression Rework

v0.0.5A Changelog:

Experimental progression system rework:  RESET RECOMMENDED

- Slime health will no longer increase with player level

- Upgrades are now slightly less effective and cost less

- Changed required levels to unlock new slimes: Green: 0 Blue: 2 Red: 5 Angel: 10 Boss: 15 Black: 20 Multi: 25

- Adjusted all slime health to match the players current progression

General Updates/Fixes:

- Made additional changes to hero movement ensuring they jump at the correct time

- Fixed some visual layout inaccuracies

- Adjusted level tutorial to display information relevant to the new progression system