Small tweaks and balance changes — Lichenvale Steam update #141404

Based on player feedback I had provided some tweaks and balance changes in this patch: - Removed copyrighted music from tutorial - Increased Nightmare Fuel generation rate - Reduced Nightmare Fuel cost for Fireball and Ice Lance - Rescaled damage for Fireball and Ice Lance - Monsters now receive 2.5x damage from other monsters and deflected projectiles - Small lighting improvement on first level - Spawners on second level now spawn monsters in succession rather than at once - Tweaked interactable item text to better reflect their purpose (open, pull, light the flames, finish level)