Hold Spacebar, Stop Jumping

Hello,

My character jumps using spacebar. When I HOLD spacebar down, he jumps over and over and over. I want him to perform the jump each time spacebar is pressed; but not when spacebar is held down. The script I'm using is below:

 using UnityEngine;

using System.Collections;

public class Walker : MonoBehaviour {

 private IRagePixel ragePixel;
  
 public enum WalkingState {Standing=0, WalkRight, WalkLeft, JumpUp};
 public WalkingState state = WalkingState.Standing;
 public RagePixelSprite space;
 public float walkingSpeed = 10f;
 

 void Start () {
     ragePixel = GetComponent<RagePixelSprite>();
 }
 
 void Update () {
     if (Input.GetKey("space"))
     {
         state = WalkingState.JumpUp;
     }
     else if (Input.GetKey(KeyCode.LeftArrow))
     {
         state = WalkingState.WalkLeft;
     }
     else if (Input.GetKey(KeyCode.RightArrow))
     {
         state = WalkingState.WalkRight;
     }
     else
     {
         state = WalkingState.Standing;
     }
   
     switch (state)
     {
             case (WalkingState.JumpUp):
             ragePixel.SetHorizontalFlip(false);
             ragePixel.PlayNamedAnimation("JUMP", false);
             break;
         
         case(WalkingState.Standing):
             ragePixel.SetHorizontalFlip(false);
             ragePixel.PlayNamedAnimation("STAY", false);
             break;

         case (WalkingState.WalkLeft):
             ragePixel.SetHorizontalFlip(false);
             ragePixel.PlayNamedAnimation("WALK", false);
             break;

         case (WalkingState.WalkRight):
             ragePixel.SetHorizontalFlip(false);
             ragePixel.PlayNamedAnimation("WALK", false);
             break;

     }
 }

}

Any help is greatly appreciated. Thank you so much!