Yes, it is a game. For the EDS, press 5 to display the selector,
then press 4 to switch it on, then 1 or 2 to select what is to be
displayed. 3 is to make it disappear.
Basic route 1 will show like this:
1 OSIEDLE PIASKI
or
1 OSIEDLE POGODNA
on the EDS on the bus.
For the Ikarus 260 (I presume you have no other bus), it uses
plywood destos, not EDS. So it shall look different.