Demo Update 0.4

Changelog: - Progression screen now waits for animation feedback, avoiding crashing - General audio improvements to both character, items, tower, interface and environment - General upgrade prices updated - Stones and tree colliders have been adjusted - Corrected multiple purchases in the upgrade tree - Tower HP upgrade has been adjusted - Corrected final hammering not working - General interface tweaks that didn't work - Fixed Hegnos walking slowly after collecting items and delivering to the tower - Corrected enemies interacting with resource on the ground - Fixed problem with exiting pause menu using ESC