[Zh3r0]

Here's something I've spotted...

You use "Mode" here but in OnPlayerUpdate you use "Editing" it will never be called because variable "Editing" will never get value 1.

pawn Code:

if(strcmp(cmd, "/mode", true) == 0)
    {
        new tmp[30];
        tmp = strtok(cmdtext, idx);
        SetPVarInt(playerid, "Mode", strval(tmp));
        return 1;
    }

And here you use this:

pawn Code:

if(GetPVarInt(playerid, "Editing") == 0) return 1;

OnPlayerUpdate will never be called.

pawn Code:

if(GetPVarInt(playerid, "Mode") == 1) SetPVarFloat(playerid, "X", GetPVarFloat(playerid, "X") - 1.0);
        else if(GetPVarInt(playerid, "Mode") == 2) SetPVarFloat(playerid, "W", GetPVarFloat(playerid, "W") - 1.0);

Also change values 0 and 1 to 1 and 2.