Web, Commodore, Windows version, Linux standalone, Windows Screensaver complete.

Makefile

@@ -35,7 +35,25 @@ screensaver: $(SRC)
 	$(WINCC) $(WINFLAGS) -DSCREENSAVER -I$(GLFWDIR)/include -o $(TARGET).scr $(SRC) \
 	  -L$(GLFWDIR)/lib-mingw-w64 $(WINLIBS)
 
-clean:
-	rm -f $(TARGET) $(TARGET).exe $(TARGET).scr
+# --- WebAssembly / browser build (Emscripten) ------------------------------
+# Produces vectorgons.js + vectorgons.wasm (load from an HTML page; see
+# web/index.html). Legacy-GL emulation maps the fixed-function + immediate-mode
+# rendering onto WebGL; GLFW3 is emulated; the VBO/FBO entry points are resolved
+# at run time, so GL_ENABLE_GET_PROC_ADDRESS is required. Run:
+#   source /path/to/emsdk/emsdk_env.sh && make web
+# Must be served over HTTP (WebAssembly will not load from file://).
+EMCC     ?= emcc
+EMFLAGS   = -O2 -std=c11 -sUSE_GLFW=3 -sLEGACY_GL_EMULATION=1 -sGL_UNSAFE_OPTS=0 \
+            -sGL_ENABLE_GET_PROC_ADDRESS=1 -sALLOW_MEMORY_GROWTH=1 \
+            -sINITIAL_MEMORY=67108864 -sEXIT_RUNTIME=0
 
-.PHONY: run windows screensaver clean
+web: web/vectorgons.js
+
+web/vectorgons.js: $(SRC)
+	mkdir -p web
+	$(EMCC) $(EMFLAGS) $(SRC) -o web/vectorgons.js
+
+clean:
+	rm -f $(TARGET) $(TARGET).exe $(TARGET).scr web/vectorgons.js web/vectorgons.wasm
+
+.PHONY: run windows screensaver web clean