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