Works for leader only

This script will work for only the leader of the level, might i ask why?

//#CLIENTSIDE timeout = 0.05; if (timeout){ if (mousex in |x,x+3|&&mousey in |y,y+3|){ showtext 200,mousex,mousey+1,arial,n,Noob Mask - 50g (Click to buy!); changeimgzoom 200,.6; timeout = 0.05;} else hideimg 200;}

timereverywhere;