diff --git a/build_desktop.sh b/build_desktop.sh
index 7f92bb5..cc977dd 100755
--- a/build_desktop.sh
+++ b/build_desktop.sh
@@ -8,7 +8,7 @@ if [[ -v 1 ]]; then
     if [ "$1" = "DEBUG" ]; then
         ODIN_FLAGS="-debug"
     elif [ "$1" = "RELEASE" ]; then
-        ODIN_FLAGS="-o:speed"
+        ODIN_FLAGS="-o:speed -extra-linker-flags:\"-Wl,--gc-sections\""
     else
         echo "Usage: <script> <DEBUG/RELEASE>"
         exit 1
@@ -22,3 +22,7 @@ mkdir -p $OUT_DIR
 odin build src/desktop -out:"$OUT_DIR/$EXE_NAME" $ODIN_FLAGS
 cp -R $ASSETS_DIR ./$OUT_DIR/
 echo "Desktop build created in ${OUT_DIR}"
+
+if [ "$1" = "RELEASE" ]; then
+    upx "$OUT_DIR/$EXE_NAME"
+fi
diff --git a/build_web.sh b/build_web.sh
index 014728f..db4f94d 100755
--- a/build_web.sh
+++ b/build_web.sh
@@ -10,7 +10,7 @@ if [[ -v 1 ]]; then
     if [ "$1" = "DEBUG" ]; then
         ODIN_FLAGS="-debug"
     elif [ "$1" = "RELEASE" ]; then
-        ODIN_FLAGS=""
+        ODIN_FLAGS="-o:size"
     else
         echo "Usage: <script> <DEBUG/RELEASE>"
         exit 1
@@ -42,7 +42,8 @@ files="$OUT_DIR/$WASM_OBJ_NAME $RAYLIB_PATH/wasm/libraylib.a $RAYLIB_PATH/wasm/l
 
 # index_template.html contains the javascript code that calls the procedures in
 # source/main_web/main_web.odin
-flags="-O0 -sEXPORTED_RUNTIME_METHODS=['HEAPF32'] -sUSE_GLFW=3 -sWASM_BIGINT -sWARN_ON_UNDEFINED_SYMBOLS=0 --shell-file $INDEX_TEMPLATE_PATH --preload-file src/assets"
+EMCC_SETTINGS="-sEXPORTED_RUNTIME_METHODS=['HEAPF32'] -sUSE_GLFW=3 -sWASM_BIGINT -sWARN_ON_UNDEFINED_SYMBOLS=0"
+flags="-Wl,--gc-sections -Os $EMCC_SETTINGS --shell-file $INDEX_TEMPLATE_PATH --preload-file src/assets"
 
 # For debugging: Add `-g` to `emcc` (gives better error callstack in chrome)
 emcc -o $OUT_DIR/index.html $files $flags
diff --git a/src/libraries/raylib/build.sh b/src/libraries/raylib/build.sh
index f0a4709..7f5fe36 100755
--- a/src/libraries/raylib/build.sh
+++ b/src/libraries/raylib/build.sh
@@ -82,7 +82,7 @@ if [[ -v 1 ]]; then
         CFLAGS="-g"
     elif [ "$1" = "RELEASE" ]; then
         MAKE_FLAGS="RAYLIB_BUILD_MODE=RELEASE"
-        CFLAGS="-Os"
+        CFLAGS="-Os -ffunction-sections -fdata-sections"
     else
         echo "Usage: <script> <DEBUG/RELEASE>"
         exit 1
@@ -101,7 +101,7 @@ source $emsdk_env
 
 pushd raylib/src
 echo "Compiling raylib static library for linux"
-make --silent RAYLIB_CONFIG_FLAGS="$CONFIG_FLAGS" $MAKE_FLAGS PLATFORM_OS=LINUX -B
+make --silent RAYLIB_CONFIG_FLAGS="$CONFIG_FLAGS" CUSTOM_CFLAGS="$CFLAGS" $MAKE_FLAGS PLATFORM_OS=LINUX -B
 mv libraylib.a "../../${linux_library_dest}"
 make --silent clean
 
@@ -111,7 +111,7 @@ make --silent clean
 # make --silent clean
 
 echo "Compiling raylib static library for web"
-make --silent RAYLIB_CONFIG_FLAGS="$CONFIG_FLAGS" $MAKE_FLAGS PLATFORM=PLATFORM_WEB -B
+make --silent RAYLIB_CONFIG_FLAGS="$CONFIG_FLAGS" CUSTOM_CFLAGS="$CFLAGS" $MAKE_FLAGS PLATFORM=PLATFORM_WEB -B
 mv libraylib.web.a libraylib.a
 mv libraylib.a "../../${wasm_library_dest}"
 make --silent clean