diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..aa3b227
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+set -e
+
+SRC_DIR="src"
+OUT_DIR="build"
+OUT_NAME="game"
+
+BUILD_ONLY=0
+OPTIMIZED=0
+WEB=0
+CLEAN=0
+DEBUGGER=0
+
+usage() {
+	echo "Usage: $0 [-b] [-o] [-w] [-d] [-c] [-h]"
+	echo "  -b   build only, don't run"
+	echo "  -o   optimized release build (-o:speed, no debug info)"
+	echo "  -w   web/WASM build (js_wasm32 target)"
+	echo "  -d   build then launch in debugger instead of running"
+	echo "  -c   clean build artifacts"
+	echo "  -h   show this help"
+	exit 1
+}
+
+while getopts "bowdch" opt; do
+	case $opt in
+		b) BUILD_ONLY=1 ;;
+		o) OPTIMIZED=1 ;;
+		w) WEB=1 ;;
+		d) DEBUGGER=1 ;;
+		c) CLEAN=1 ;;
+		h) usage ;;
+		*) usage ;;
+	esac
+done
+
+mkdir -p "$OUT_DIR"
+
+if [ "$CLEAN" -eq 1 ]; then
+	echo "Cleaning..."
+	rm -rf "${OUT_DIR:?}"/*
+	exit 0
+fi
+
+if [ "$WEB" -eq 1 ]; then
+	echo "Building web (WASM)..."
+	odin build "$SRC_DIR" \
+		-target:js_wasm32 \
+		-out:"$OUT_DIR/$OUT_NAME.wasm" \
+		$( [ "$OPTIMIZED" -eq 1 ] && echo "-o:speed" || echo "-debug" )
+
+	# copy the JS glue/html shell if you keep one alongside the script
+	if [ -f "web/index_template.html" ]; then
+		cp web/index_template.html "$OUT_DIR/index.html"
+	fi
+
+	echo "Web build complete -> $OUT_DIR/$OUT_NAME.wasm"
+	exit 0
+fi
+
+if [ "$OPTIMIZED" -eq 1 ]; then
+	echo "Building optimized ($SRC_DIR -> $OUT_DIR/$OUT_NAME)..."
+	odin build "$SRC_DIR" -out:"$OUT_DIR/$OUT_NAME" -o:speed -no-bounds-check
+else
+	echo "Building debug ($SRC_DIR -> $OUT_DIR/$OUT_NAME)..."
+	odin build "$SRC_DIR" -out:"$OUT_DIR/$OUT_NAME" -debug
+fi
+
+echo "Build complete."
+
+if [ "$BUILD_ONLY" -eq 0 ]; then
+	echo "----------------------------------------"
+	if [ "$DEBUGGER" -eq 1 ]; then
+		lldb "$OUT_DIR/$OUT_NAME"
+	else
+		"./$OUT_DIR/$OUT_NAME"
+	fi
+fi