Question I'm making a puzzle game mechanic but it's not working properly

I'm making a mechanic for my new hacking themed puzzle game where you can type certain phrases and you can then move around the object that is associated with that phrase and when hit the enter key it's supposed to return you to controlling the player character however when you press enter this doesn't happen. Can anyone help? here's the code I used:

Code (CSharp):

1.  if(inputField.text == "Blocks")
2.         {
3.             cubes.GetComponent<CubeMovement>().enabled = true;
4.             moveSpeed = 0f;
5.             if(Input.GetKeyDown(KeyCode.Return))
6.             {
7.                cubes.GetComponent<CubeMovement>().enabled = false;
8.                moveSpeed = 5f;
9.             }
10.         }

 

maybe reset the input field text value in this section

Code (CSharp):

1. if(Input.GetKeyDown(KeyCode.Return))
2.             {
3.                cubes.GetComponent<CubeMovement>().enabled = false;
4.                moveSpeed = 5f;
5.                //reset the input field value
6.                inputField.text = "";
7.             }

if the inputField.text remains the same the entire if will remain true the next frame and it will run again disabling the movement

this one

Code (CSharp):

1. if(inputField.text == "Blocks")