Version 0.51

Update:

Added astral fruit chest.
Monster auto-switching added.
Updated the gold membership system (tech part).
Acceleration button for sparks.
Added clean up surfaces and buffers (optimization).
Factory upgrade system.
Fix for resource drop from monsters.
Updated the description of mage guild experience.
Changed the formula and display of the prism coefficient.
Monster HP bar is now semi-transparent instead of disappearing.
Artifact Achievement Fix.