Add main menu

src/main.rs

@@ -39,6 +39,7 @@ mod rect;
 mod save_load_system;
 mod spawner;
 mod visibility_system;
+mod rex_assets;
 
 #[derive(PartialEq, Copy, Clone)]
 pub enum RunState {
@@ -457,6 +458,7 @@ fn main() -> rltk::BError {
 
     gs.ecs.insert(rltk::RandomNumberGenerator::new());
     gs.ecs.insert(particle_system::ParticleBuilder::new());
+    gs.ecs.insert(rex_assets::RexAssets::new());
 
     gs.ecs.register::<Position>();
     gs.ecs.register::<Renderable>();