Add Pong game with full cross-platform support and README

Author: tadeyemo32

games/pong/.DS_Store

@@ -3,7 +3,20 @@ CFLAGS = -Wall -std=c99
 SRC = main.c
 OUT = game
 
-LIBS = -lraylib -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo
+UNAME_S := $(shell uname -s)
+
+ifeq ($(UNAME_S),Linux)
+    LIBS = -lraylib -lGL -lm -lpthread -ldl -lrt -lX11
+endif
+
+ifeq ($(UNAME_S),Darwin)
+    LIBS = -lraylib -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo
+endif
+
+ifeq ($(OS),Windows_NT)
+    LIBS = -lraylib -lopengl32 -lgdi32 -lwinmm
+    OUT := game.exe
+endif
 
 $(OUT): $(SRC)
 	$(CC) $(CFLAGS) $(SRC) -o $(OUT) $(LIBS)

games/pong/Makefile

@@ -1,11 +1,23 @@
-# Pong Game in C
+# My Raylib Game
 
-A simple Pong game written in C using Raylib.
+A simple game built using [Raylib](https://www.raylib.com/) and C.
 
-## How to Build
+##  Build Instructions (macOS/Linux)
 
-Make sure you have [raylib](https://www.raylib.com/) installed, then:
+Make sure you have Raylib installed.
+
+### macOS
+Install Raylib via Homebrew:
 
 ```bash
-make
-./game
+brew install raylib
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