0.5.0 Content update pt 1

This update will not add any new mechanics (after v1). HOWEVER, it will add a lot more variety.

New features:

• character select (2 characters, each with different secondary weapons, stats, and actives)
• 1 new item (can you find it?)
• LOGO
• slightly better vfx
• firerate calculation rework
• enemy buff
• BETTER LEVEL GENERATION!!! (wave 2-> item room, wave 3->shop, wave 4->item room)
• stuff I forgot?
• bugs?