Populate minigame with obstacles and monster spawns (#5)

- Simulated "fake" physics and collisions
- Object pooling for tiles, obstacles and monster spawns
- Base monster scoring with proximity triggers and depth multiplier

Co-authored-by: AlexanderT <alexander@foolhardyhorizons.com>
Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #5

Assets/Scripts/DamianExperiments/LawnMowerChaseBehaviour.cs

@@ -0,0 +1,69 @@
+using UnityEngine;
+using Pixelplacement;
+
+public class LawnMowerChaseBehaviour : MonoBehaviour
+{
+    public Spline ChaseSpline;
+    public Transform LawnMowerObject;
+    public float chaseDuration;
+    public float chaseDelay;
+
+    private Vector3 _originalScale;
+    private bool _facingRight = true;
+    private bool _movingForward = true;
+    private float _lastPercentage = 0f;
+    private const float AnchorThreshold = 0.1f; // Tolerance for anchor detection
+
+    void Start()
+    {
+        _originalScale = LawnMowerObject.localScale;
+
+        Tween.Spline(
+            ChaseSpline,
+            LawnMowerObject,
+            0,
+            1,
+            false,
+            chaseDuration,
+            chaseDelay,
+            Tween.EaseInOut,
+            Tween.LoopType.PingPong,
+            onComplete: OnTweenComplete
+        );
+    }
+
+    private void OnTweenComplete()
+    {
+        _movingForward = !_movingForward;
+        Flip(_movingForward);
+    }
+
+    private void OnTweenUpdate()
+    {
+        // Find the current percentage along the spline
+        float percentage = ChaseSpline.ClosestPoint(LawnMowerObject.position);
+
+        // Detect anchor arrival and flip accordingly
+        if (_facingRight && percentage >= 1f - AnchorThreshold)
+        {
+            Flip(false); // Face left at end anchor
+            _facingRight = false;
+        }
+        else if (!_facingRight && percentage <= AnchorThreshold)
+        {
+            Flip(true); // Face right at start anchor
+            _facingRight = true;
+        }
+
+        _lastPercentage = percentage;
+    }
+
+    private void Flip(bool faceRight)
+    {
+        var scale = _originalScale;
+        scale.x = Mathf.Abs(scale.x) * (faceRight ? 1 : -1);
+        LawnMowerObject.localScale = scale;
+    }
+
+    void Update() { }
+}