Arena/Endless Rework

[h2]Arena and Endless mode now reworked. [/h2] [list] [*] You are picking one buff at a time time now. After you get >8 buffs/debuffs every next stage is gonna disable random buff and debuff. [*] Added few Arena variations (objects and visuals). More stuff is coming. [*] Added new track by [b]jsbender[/b]. Thank for your amazing work! [*] Added new amazing artwork by [b]Asawanda[/b]. This dude is crazy good. [*] Follow bullets speed increased. [/list]