Jump with Spacebarhit. Longjump with Spacebar Hold

Hello all!

I'm currently trying to make a little "jump only" game.

My goal is that the player can perform short jumps in y and x direction (ergo a diagonaljump if you want) when the player hits the spacebar.

But I also want to let the player perform a longer jump when he holds the spacebar for let's say one second.

To sum it up:

Spacebar hit --> short jump (in x and y direction)

Spacebar pressed and hold --> long jump (in x and y direction)

I tried a lot, but the results don't satisfy me in any way...

That's what I have right now:

 void Update()
     {
 
         //Gravity Control
         ////////////////////////////////////////////////
         if(grounded)
         {
             Physics2D.gravity = new Vector3(0, -30, 0);
         }
         else
             Physics2D.gravity = new Vector2(200, -30);
         ////////////////////////////////////////////////
         /// 
         /// 
         if (!grounded) 
         {
                         jumpTime += Time.deltaTime;
                         anim.SetFloat ("jumpTime", jumpTime);
         } 
         else if (grounded)
         {
                         jumpTime = 0f;
         }
 
 //Jump Control
         ////////////////////////////////////////////////
         /// 
 
         if (grounded && Input.GetButton ("Jump"))
         {
             anim.SetBool ("Ground", false);
 
             rigidbody2D.AddForce (new Vector2 (jumpForceX, jumpForceY));
 
             if(Input.GetButtonDown ("Jump")&& jumpTime>0f)
             
                 rigidbody2D.AddForce (new Vector2 (20*jumpForceX, 20*jumpForceY));
 
         } 
 }

Do you have an idea how I could tackle this? :)

Cheers!