diff --git a/README.md b/README.md
index 26f671d..f0497cd 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 # raylib-d [![DUB](https://img.shields.io/dub/v/raylib-d?style=for-the-badge)](https://code.dlang.org/packages/raylib-d)
 (static) D bindings for [raylib](https://www.raylib.com/), a simple and easy-to-use library to learn videogames programming.
 
+# Differences from Raylib
+All functions, types, and enum values are the same as in upstream Raylib. The only difference is that the `zoom` property of the `Camera2D` struct is initially set to `1.0f` instead of `0.0f`.
+
 # Installation
 
 ## Adding the dependency
diff --git a/dub.json b/dub.json
index f5a92b9..d99b348 100644
--- a/dub.json
+++ b/dub.json
@@ -5,19 +5,19 @@
 	"authors": [
 		"ONROUNDIT"
 	],
-        "configurations" : [
-            {
-                "name": "library"
-            },
-            {
-                "name": "unittest",
-                "versions" : ["raylib_test"],
-                "libs" : ["raylib"],
-                "lflags-posix": ["-L."],
-                "lflags-osx": ["-rpath", "@executable_path/"],
-                "lflags-linux" : ["-rpath=$$ORIGIN"]
-            }
-        ],
+    "configurations" : [
+        {
+            "name": "library"
+        },
+        {
+            "name": "unittest",
+            "versions" : ["raylib_test"],
+            "libs" : ["raylib"],
+            "lflags-posix": ["-L."],
+            "lflags-osx": ["-rpath", "@executable_path/"],
+            "lflags-linux" : ["-rpath=$$ORIGIN"]
+        }
+    ],
 	"copyright": "Copyright (c) Ramon Santamaria (@raysan5), Petro Romanovych (@onroundit), Jan Hoenig (@m3m0ry), Steven Schveighoffer (@schveiguy), Liam McGillivray (@LiamM32)",
         "excludedSourceFiles": ["source/rlgl.d", "source/raymath.d", "source/easings.d", "source/raymathext.d", "source/raylib_types.d"],
 	"targetType": "sourceLibrary",
diff --git a/source/raylib/package.d b/source/raylib/package.d
index ddeb78f..5f73d4c 100644
--- a/source/raylib/package.d
+++ b/source/raylib/package.d
@@ -270,15 +270,6 @@ struct Camera3D
 
 alias Camera = Camera3D; // Camera type fallback, defaults to Camera3D
 
-// Camera2D, defines position/orientation in 2d space
-struct Camera2D
-{
-    Vector2 offset; // Camera offset (displacement from target)
-    Vector2 target; // Camera target (rotation and zoom origin)
-    float rotation; // Camera rotation in degrees
-    float zoom; // Camera zoom (scaling), should be 1.0f by default
-}
-
 // Mesh, vertex data and vao/vbo
 struct Mesh
 {
diff --git a/source/raylib/raylib_types.d b/source/raylib/raylib_types.d
index d1f4199..a294bc0 100644
--- a/source/raylib/raylib_types.d
+++ b/source/raylib/raylib_types.d
@@ -2,6 +2,9 @@
 module raylib.raylib_types;
 
 import raylib;
+debug import std.stdio;
+
+@safe:
 
 // Vector2 type
 struct Vector2
@@ -54,6 +57,17 @@ struct Matrix
     float m15 = 0.0f;
 }
 
+// Camera2D, defines position/orientation in 2d space
+struct Camera2D
+{
+
+    Vector2 offset; // Camera offset (displacement from target)
+    Vector2 target; // Camera target (rotation and zoom origin)
+    float rotation; // Camera rotation in degrees
+    // Warning: In Raylib, & previous versions of Raylib-D, `zoom` is initially `0.0f`.
+    float zoom = 1f; // Camera zoom (scaling), should be 1.0f by default
+}
+
 // Rectangle type
 struct Rectangle
 {
@@ -64,7 +78,19 @@ struct Rectangle
     alias w = width;
     alias h = height;
 
-    Vector2 origin() { // Rectangle function exclusive to raylib-d
+    // The following rectangle functions are exclusive to Raylib-D.
+
+    float top() const {return y;}
+    float bottom() const {return y + height;}
+    float left() const {return x;}
+    float right() const {return x + width;}
+
+    void top(const float yPosition) {y = yPosition;}
+    void bottom(const float yPosition) {y = yPosition - height;}
+    void left(const float xPosition) {x = xPosition;}
+    void right(const float xPosition) {x = xPosition - width;}
+
+    Vector2 origin() {
         return Vector2(x, y);
     }
     alias position = origin;
@@ -102,6 +128,8 @@ struct Rectangle
         result.opOpAssign!op(offset);
         return result;
     }
+
+    Vector2 opCast(T)() if (is(T==Vector2)) => origin();
 }
 
 enum Colors
@@ -134,7 +162,7 @@ enum Colors
     BLACK = Color(0, 0, 0, 255), // Black
     BLANK = Color(0, 0, 0, 0), // Blank (Transparent)
     MAGENTA = Color(255, 0, 255, 255), // Magenta
-    RAYWHITE = Color(245, 245, 245, 255), // My own White (raylib logo)
+    RAYWHITE = Color(245, 245, 245, 255), // Grey-white colour from Raylib logo
 }
 
 unittest
@@ -147,7 +175,10 @@ unittest
     float height = 20.0f;
     Rectangle rect = Rectangle(x, y, width, height);
     assert(rect.origin.x == 543.3f, "`rect.origin.x` should be 543.3, not "~to!string(rect.origin.x));
+    assert(rect.left == 543.3f, "`rect.left` should be 543.3, not "~to!string(rect.left));
+    assert(rect.right == 593.3f, "`rect.right` should be 593.3, not "~to!string(rect.right));
     assert(rect.origin.y == 235.9f, "`rect.centre.y` should be 235.9, not "~to!string(rect.origin.y));
+    assert(rect.bottom == 255.9f, "`rect.bottom` should be 255.9, not "~to!string(rect.bottom));
     assert(rect.dimensions == Vector2(50.0f, 20.0f));
     assert(rect.topLeft == Vector2(x:543.3f, y:235.9f), "`rect.topLeft` should be Vector2(543.3, 235.9), not "~to!string(rect.topLeft));
     assert(rect.topRight.x == 593.3f);
@@ -165,4 +196,11 @@ unittest
     rect -= Vector2(4.5f, 2.3f);
     assert(rect.x == 24.5f, "`rect.x` should be 24.5f. Instead it is "~to!string(rect.x));
     assert(rect.y == 19.0f, "`rect.y` should be 20.7f. Instead it is "~to!string(rect.y));
+
+    rect.right = 100f;
+    rect.bottom = 60f;
+    assert(rect.x == 50.0f);
+    assert(rect.left == 50.0f);
+    assert(rect.y == 40.0f);
+    assert(rect.top == 40.0f);
 }