its Extreamly easy ... well in ur source the level is Byte which means u can reach to 255.. so lets see how this work .. When u kill Monsters u gain Exp thats if ur level is 140- rather than that u dont gain exp ..so u will have to Edit this part ... then when ur exp = to the Experience needed fo the second level ... then player level Increases ..the Experience needed for Levels is Identified inside Database / DataHolder.cs in form of Array having 140 Indexes (cuz max level is 140).. so if u would like to have max level 170 .. u have to add another 30 Indexes with Experience needed for each of them .. Ta Da u r Done