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Assets/Scripts/MoveController.cs

@@ -10,6 +10,7 @@ public class MoveController : MonoBehaviour
 
     public int horizontalRayCount = 4;
     public int verticalRayCount = 4;
+    public LayerMask collisionMask;
 
     private float horizontalRaySpacing;
     private float verticalRaySpacing;
@@ -19,13 +20,29 @@ public class MoveController : MonoBehaviour
 
     void Start() {
         collider = GetComponent<BoxCollider2D>();
+        CalculateRaySpacing();
     }
 
-    void Update() {
+    public void Move(Vector3 velocity) {
         UpdateRaycastOrigins();
-        CalculateRaySpacing();
+        VerticalCollisions(ref velocity);
+        transform.Translate(velocity);
+    }
+
+    private void VerticalCollisions(ref Vector3 velocity) {
+        float directionY = Mathf.Sign(velocity.y); // -1 for down, 1 for up
+        float rayLength = Mathf.Abs(velocity.y) + skinWidth;
 
         for (int i = 0; i < verticalRayCount; i++) {
+            Vector2 rayOrigin = (directionY > 0) ? raycastOrigins.topLeft : raycastOrigins.bottomLeft;
+            rayOrigin += Vector2.right * (verticalRaySpacing * i + velocity.x);
+
+            RaycastHit2D hit = Physics2D.Raycast(rayOrigin, Vector2.up * directionY, rayLength, collisionMask);
+            if (hit) {
+                velocity.y = (hit.distance - skinWidth) * directionY;
+                rayLength = hit.distance;
+            }
+
             Debug.DrawRay(raycastOrigins.bottomLeft + Vector2.right * verticalRaySpacing * i, Vector2.up * -2, Color.red);
         }
     }

Assets/Scripts/PlayerController.cs

@@ -4,6 +4,10 @@ using UnityEngine;
 
 [RequireComponent(typeof(MoveController))]
 public class PlayerController : MonoBehaviour {
+
+    public float gravity = -20f;
+
+    private Vector3 velocity;
     private MoveController moveController;
 
     void Start() {
@@ -11,6 +15,8 @@ public class PlayerController : MonoBehaviour {
     }
 
     void Update() {
+        velocity.y += gravity * Time.deltaTime;
+        moveController.Move(velocity * Time.deltaTime);
     }
 
     void FixedUpdate() {