Fix for tetrominoes falling partway through the floor.

Assets/Scripts/tetromino.cs

@@ -70,6 +70,7 @@ public class tetromino : MonoBehaviour
     private bool validateFall(Transform pieceToCheck) //returns true if the next step collides with something
     {
         //Cast a ray to the next position of the tetromino. 
+        //NOTE: disabled "Queries Start in Colliders" in Project Settings>Physics 2D (thank you again, Tavi).
         RaycastHit2D collision = Physics2D.Raycast(pieceToCheck.position, Vector2.down, 1.0f);
         Debug.DrawRay(pieceToCheck.position,Vector3.down,Color.red,1000.0f);
         if (collision.collider != null && collision.collider.name != pieceToCheck.name)
@@ -83,11 +84,9 @@ public class tetromino : MonoBehaviour
             }
             return true;
         }
-        else
-        {
+
         return false;
     }
-    }
 
     void Fall()
     {

Packages/manifest.json

@@ -6,7 +6,7 @@
     "com.unity.2d.sprite": "1.0.0",
     "com.unity.2d.spriteshape": "6.0.1",
     "com.unity.2d.tilemap": "1.0.0",
-    "com.unity.collab-proxy": "1.9.0",
+    "com.unity.collab-proxy": "1.11.2",
     "com.unity.ide.rider": "3.0.7",
     "com.unity.ide.visualstudio": "2.0.11",
     "com.unity.ide.vscode": "1.2.4",

Packages/packages-lock.json

@@ -73,7 +73,7 @@
       "dependencies": {}
     },
     "com.unity.collab-proxy": {
-      "version": "1.9.0",
+      "version": "1.11.2",
       "depth": 0,
       "source": "registry",
       "dependencies": {},

ProjectSettings/Physics2DSettings.asset

@@ -3,7 +3,7 @@
 --- !u!19 &1
 Physics2DSettings:
   m_ObjectHideFlags: 0
-  serializedVersion: 4
+  serializedVersion: 5
   m_Gravity: {x: 0, y: -9.81}
   m_DefaultMaterial: {fileID: 0}
   m_VelocityIterations: 8
@@ -38,9 +38,9 @@ Physics2DSettings:
     m_IslandSolverJointCostScale: 10
     m_IslandSolverBodiesPerJob: 50
     m_IslandSolverContactsPerJob: 50
-  m_AutoSimulation: 1
+  m_SimulationMode: 0
   m_QueriesHitTriggers: 1
-  m_QueriesStartInColliders: 1
+  m_QueriesStartInColliders: 0
   m_CallbacksOnDisable: 1
   m_ReuseCollisionCallbacks: 1
   m_AutoSyncTransforms: 0

ProjectSettings/ProjectVersion.txt

@@ -1,2 +1,2 @@
-m_EditorVersion: 2021.1.22f1
-m_EditorVersionWithRevision: 2021.1.22f1 (a137e5fb0427)
+m_EditorVersion: 2021.1.24f1
+m_EditorVersionWithRevision: 2021.1.24f1 (6667702a1e7c)