Demo adjustments

[list] [*] Player speed +5% [*] Player jump height +6% [*] Light range +15% [*] Player's hitboxes adjusted [*] Adjusted the hitboxes of unbreakable blocks [*] Lava speed on the first level of the mine -7% [*] Block that spawns ores and chest spawns ores vertically instead of in all directions [/list]