I presume the accelerometer application is supposed to move the ‘ball’ on the OLED Display in the direction that the board is tipped. That needs a swap of axes and reversal of X in the Arduino code for Acele_show() :
ax = -accelemeter.getAccelerationY();
ay = accelemeter.getAccelerationX();
With this edit, the board as delivered with the Grove modules still attached to the Arduino now moves the ball correctly as the kit is tipped.