Textures and sprites are now managed by a single module in textures.hpp, and even though it is a _single_ location to access all sprites it is NOT a singleton. Those are illegal.

main.cpp

@@ -1,5 +1,5 @@
 #include "gui_fsm.hpp"
-#include "textures2.hpp"
+#include "textures.hpp"
 
 int main() {
   textures::init();