Adding the CancelFormerMomentumOnJump option on the script

CharacterController2D.cs

@@ -4,7 +4,8 @@
 public class CharacterController2D : MonoBehaviour
 {
 	[SerializeField] private float m_JumpForce = 400f;							// Amount of force added when the player jumps.
-	[Range(0, 1)] [SerializeField] private float m_CrouchSpeed = .36f;			// Amount of maxSpeed applied to crouching movement. 1 = 100%
+    public bool cancelFormerMomentumOnJump = false;                             // If the former momentum should be canceled before the player jumps. Turning it on will always make the player jump the same amount, even if it is going down or up
+    [Range(0, 1)] [SerializeField] private float m_CrouchSpeed = .36f;			// Amount of maxSpeed applied to crouching movement. 1 = 100%
 	[Range(0, .3f)] [SerializeField] private float m_MovementSmoothing = .05f;	// How much to smooth out the movement
 	[SerializeField] private bool m_AirControl = false;							// Whether or not a player can steer while jumping;
 	[SerializeField] private LayerMask m_WhatIsGround;							// A mask determining what is ground to the character
@@ -128,7 +129,10 @@ public void Move(float move, bool crouch, bool jump)
 		{
 			// Add a vertical force to the player.
 			m_Grounded = false;
-			m_Rigidbody2D.AddForce(new Vector2(0f, m_JumpForce));
+            if (cancelFormerMomentumOnJump) {
+                m_Rigidbody2D.velocity = new Vector2(m_Rigidbody2D.velocity.x, 0);
+            }
+            m_Rigidbody2D.AddForce(new Vector2(0f, m_JumpForce));
 		}
 	}