adding top collision

src/world.c

@@ -52,7 +52,8 @@ Entity *SpawnEntity(
     float y,
     float size,
     float mass,
-    Color color)
+    Color color,
+    float drag)
 {
     for (int i = 0; i < MAX_ENTITIES; i++)
     {
@@ -67,6 +68,7 @@ Entity *SpawnEntity(
 
             e->mass = mass;
             e->size = size;
+            e->drag = drag;
 
             e->position = (Vector2){x, y};
             e->velocity = (Vector2){0, 0};
@@ -104,7 +106,8 @@ void InitWorld(void)
         120,
         40,
         1.0f,
-        BLUE);
+        BLUE,
+        0.1f);
 
     if (player)
     {
@@ -118,7 +121,8 @@ void InitWorld(void)
             50,
             25,
             1.0f,
-            RED);
+            RED,
+            0.9f);
     }
 
     simTime = 0.0f;