You need to know that upgrades and evolutions are different stuff when it comes to slither type iO games. Play LittleBigSnake.io Unblocked at the school against real enemies after completing tutorial missions coming out of lair. Evolutions are based on gold won by battles against other little and big snakes. Shop is where you can buy new skins and other kind of stuff for your snake with some more worthy jewelry those are really hard to earn. Move by scrolling mouse and accelerate by holding LMB which will cost you some energy. So, you need to use accelerating when it’s really needed. Follow scoreboard where top 10 players and your score are showed all the time.