Based on the answers provided, the following corrections need to be made to the 3D object:

1. The object should be redesigned to resemble a 1x1 elongated Lego brick. This means it should have a rectangular shape without any additional extrusions. 

2. The object's hollowed-out status needs to be clarified. If it is not already, the object should be hollowed out, keeping only the top of the extruded square.

3. The height of the extruded circle needs to be adjusted to be about 1/7th the height of the square's extrusion. If it is not already, this proportion should be corrected.