Bouncy Bouncy

Assets/Scripts/BouncyButton.cs

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+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.InputSystem;
+
+public class BouncyButton : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
+{
+    bool isHovered = false;
+    bool isHeld = false;
+    bool didBounce = false;
+    Vector3 originalScale;
+    Vector3 finalScale;
+
+    void Start()
+    {
+        originalScale = transform.localScale;
+        finalScale = originalScale * 1.1f;
+    }
+
+    public void OnPointerEnter(PointerEventData eventData) => isHovered = true;
+    public void OnPointerExit(PointerEventData eventData)
+    {
+        isHovered = false;
+        ResetScale();
+    }
+    void OnDisable()
+    {
+        isHovered = false;
+        ResetScale();
+    }
+
+    void Update()
+    {
+        if (Application.isMobilePlatform)
+        {
+            isHeld = Touchscreen.current != null && Touchscreen.current.press.isPressed;
+        }
+        else
+        {
+            isHeld = Mouse.current != null && Mouse.current.leftButton.isPressed;
+        }
+
+        if (isHovered && isHeld && !didBounce)
+        {
+            StartCoroutine(BounceOnce());
+            didBounce = true;
+        }
+
+        if ((!isHovered || !isHeld) && didBounce)
+        {
+            ResetScale();
+        }
+    }
+
+    void ResetScale()
+    {
+        StopAllCoroutines();
+        transform.localScale = originalScale;
+        didBounce = false;
+    }
+
+    System.Collections.IEnumerator BounceOnce()
+    {
+        float t = 0.125f;
+        Vector3 s1 = originalScale * 1.12f;
+        Vector3 s2 = originalScale * 1.06f;
+        Vector3 s3 = finalScale;
+
+        yield return LerpScale(originalScale, s1, t);
+        yield return LerpScale(s1, s2, t * 0.5f);
+        yield return LerpScale(s2, s3, t * 0.5f);
+
+        transform.localScale = s3;
+    }
+
+    System.Collections.IEnumerator LerpScale(Vector3 from, Vector3 to, float duration)
+    {
+        float elapsed = 0f;
+        while (elapsed < duration)
+        {
+            elapsed += Time.deltaTime;
+            float p = elapsed / duration;
+            transform.localScale = Vector3.Lerp(from, to, p);
+            yield return null;
+        }
+        transform.localScale = to;
+    }
+}

Assets/Scripts/BouncyButton.cs.meta

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+fileFormatVersion: 2
+guid: 200e77fbcd2ab3206aa2fb9665984330

Assets/Scripts/BouncyText.cs

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+using UnityEngine;
+using TMPro;
+
+public class BouncyText : MonoBehaviour
+{
+    public float frequency = 2f;
+    public float minSize = 10f;
+    public float maxSize = 12f;
+    private TextMeshProUGUI text;
+
+    void Start()
+    {
+        text = GetComponent<TextMeshProUGUI>();
+    }
+
+    void Update()
+    {
+        float newsize = (Mathf.Sin(Time.time * frequency) + 1f) / 2f;
+        text.fontSize = Mathf.Lerp(minSize, maxSize, newsize);
+    }
+}

Assets/Scripts/BouncyText.cs.meta

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+fileFormatVersion: 2
+guid: 62c57d9ea02aa39eab3ab0d771e2bf55