Update 0.4

Hello Everyone! First of all, thank you for checking out the game during FPSFest. I really appreciate it! This update is a little late to the fest unfortunately. Biggest addition is the mana system! The health orb is no longer lonely, it has got a blue friend! -Dash and Grappling Hook use mana now, so you can't just spam them anymore. -The Grimoire weapon uses mana as ammo. -There are a couple new mana-related Upgrades. Other changes: -The Jester now offers unique upgrades if you complete his challenge. -The winter-themed arena is gone, and the green grass is back. -Enemy health is rebalanced slightly, enemies got steadily stronger with each wave before, now there are additional jumps after each boss wave. -Bosses have been reworked to be more dynamic and (hopefully) more fun to fight. And some bugfixes, adjustments and tweaks of course. Hope you enjoy!