2 analog output to 1 analog input

I'm so sorry I forgot to tell what really was the problem, so the values range from like 0 to 150, and are not really working well.

I drag the Joystick in the position:
UP: X is 0 Y is 134
DOWN: X is 15 Y is 144
LEFT: X is 0 Y is 134
RIGHT: X is 14 Y is 144

Also the transistors I use are TP31C transistors, NPN type.
And I know in the picture is an Arduino Uno, but I use it for testing purposes, I already tried the same configuration on NodeMCU with almost the same result, the values were a bit different.

The circuit diagram: