Fixes, optimisations and graphical improvements (beta)

Hello everyone, After the last beta update, some annoying bugs happened. This update should fix the most of them. Also, the maps neon and stars were improved Graphical changes: - neons of the Neon map look more... neon. - Nebulas can appear on the Stars map. Shiny ! - added a trail on the players movements. - Smoothed the ball's trail. - improved the player's reactor's particles [img]{STEAM_CLAN_IMAGE}/33816433/4e7e6f196481b7fddbe6f0000828dc673e20a437.png[/img] Optimisations : - the Stars map will now spawn less stars with low graphical options - the Clouds map will now spawn less Clouds with low graphical options - 100 fps were saved in the launching menu bug fixed : GAME : - player 1 can no longer visit other player's side - with the survival option, players should now have the right electricity color on their side - globule bringing a ball in a wormhole won't stuck it anymore SCORE SCREEN - rewards obtained with level up are now showed correctly - fixed a level up bug - fixed a level up crash - fixed the way the xp is counted LAUNCHING MENU CUSTOMIZATION - colors can now be opened again with the gamepad - fixed the unwanted transparency - gamepads plugged or unplugged will take effect on the player menus