Fixed an issue with the fireball spell that had a compatibility problem with upgraded/optimized 2D light handling.
Rebalanced the mana shot spell; while it is still somewhat ineffective, it is not as underpowered as before. The reasoning is that, while the mana shot spell served as a placeholder item to catch item pool overflow cases, once obtained, it entered your starting spell item pool. This made it much more accessible than intended. Therefore, we adjusted the power level of the mana shot spell along with some of its features (wall detect, speed variation, etc).