diff --git a/src/entity.rs b/src/entity.rs
index 1f3e987..bb92a31 100644
--- a/src/entity.rs
+++ b/src/entity.rs
@@ -1,3 +1,5 @@
+use std::fmt;
+
 
 pub type EntityId = u32;
 
@@ -11,4 +13,10 @@ pub struct Location {
 pub struct Entity {
     pub id: EntityId,
     pub loc: Location
+}
+
+impl fmt::Display for Location {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "({}, {})", self.x, self.y)
+    }
 }
\ No newline at end of file
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index 883d040..6acda8e 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -21,15 +21,28 @@ enum AppStatus {
     Initial,
     GuestSelection,
     TalkToGuest(Option<u32>),
+    Debug,
+}
+
+struct DebugData<'a> {
+    list: Vec<tui::widgets::ListItem<'a>>,
+    list_state: tui::widgets::ListState,
 }
 
 pub struct App<'a> {
     game: Game,
+    status: AppStatus,
+
+    // Guest Selection
     guest_list: Vec<tui::widgets::ListItem<'a>>,
     guest_list_state: tui::widgets::ListState,
-    status: AppStatus,
+
+    // Conversation
     conversation: Chat,
     conversation_scroll: u16,
+
+    // Debug
+    dabug_data: Option<DebugData<'a>>,
 }
 
 impl<'a> App<'a> {
@@ -41,6 +54,7 @@ impl<'a> App<'a> {
             status: AppStatus::Initial,
             conversation: Chat::new(),
             conversation_scroll: 0,
+            dabug_data: None,
         }
     }
 
@@ -86,6 +100,9 @@ impl<'a> App<'a> {
                                     }
                                 }
                             },
+                            KeyCode::Char('?') => {
+                                self.open_debug();
+                            },
                             KeyCode::Char('.') => {
                                 self.game.step();
                                 self.status = AppStatus::Initial;
@@ -124,10 +141,53 @@ impl<'a> App<'a> {
                     _ => {}
                 }
                 true
+            },
+            AppStatus::Debug => {
+                match read() {
+                    Ok(Event::Key(event)) => {
+                        match event.code {
+                            KeyCode::Esc => {
+                                self.status = AppStatus::GuestSelection;
+                            },
+                            KeyCode::Up => {
+                                let selected = self.dabug_data.as_mut().unwrap().list_state.selected().unwrap();
+                                if selected > 0 {
+                                    self.dabug_data.as_mut().unwrap().list_state.select(Some(selected - 1));
+                                }
+                            },
+                            KeyCode::Down => {
+                                let selected = self.dabug_data.as_mut().unwrap().list_state.selected().unwrap();
+                                if selected < self.dabug_data.as_ref().unwrap().list.len() - 1 {
+                                    self.dabug_data.as_mut().unwrap().list_state.select(Some(selected + 1));
+                                }
+                            },
+                            _ => {}
+                        }
+                    },
+                    _ => {}
+                }
+                true
             }
         }
     }
 
+    fn open_debug(&mut self) {
+        let mut list = vec![];
+        for (id, creature) in self.game.state.creatures.iter() {
+            list.push(tui::widgets::ListItem::new(format!("{}: {} ({}) at {}",
+                id, creature.name,
+                creature.profession,
+                creature.entity.loc,
+            )));
+        }
+        self.dabug_data = Some(DebugData {
+            list,
+            list_state: tui::widgets::ListState::default(),
+        });
+        self.dabug_data.as_mut().unwrap().list_state.select(Some(0));
+        self.status = AppStatus::Debug;
+    }
+
     fn default_layout(&self) -> Layout {
         Layout::default()
             .direction(tui::layout::Direction::Vertical)
@@ -150,6 +210,9 @@ impl<'a> App<'a> {
             },
             AppStatus::TalkToGuest(guest_id) => {
                 self.draw_talk_to_guest(f, *guest_id);
+            },
+            AppStatus::Debug => {
+                self.draw_debug(f);
             }
         }
 
@@ -177,6 +240,7 @@ impl<'a> App<'a> {
         f.render_stateful_widget(main_window, chunks[0], &mut self.guest_list_state);    
         f.render_widget(controls, chunks[1]);
     }
+
     fn draw_talk_to_guest<B: Backend>(&self, f: &mut Frame<B>, guest: Option<u32>) {
         let chunks = self.default_layout().split(f.size());
 
@@ -224,6 +288,28 @@ impl<'a> App<'a> {
         f.render_widget(controls, chunks[1]);
     }
 
+    fn draw_debug<B: Backend>(&mut self, f: &mut Frame<B>) {
+        let chunks = self.default_layout().split(f.size());
+
+        let data = self.dabug_data.as_mut().unwrap();
+
+        let main_window = tui::widgets::List::new(data.list.clone())
+            .block(tui::widgets::Block::default().title("Guests").borders(tui::widgets::Borders::ALL))
+            .style(tui::style::Style::default().fg(tui::style::Color::White))
+            .highlight_style(tui::style::Style::default().add_modifier(tui::style::Modifier::ITALIC))
+            .highlight_symbol(">>");
+
+        let mut binding = Controls::new();
+        let controls = binding
+            .add("↑↓".to_owned(), "select guest".to_owned())
+            .add("Esc".to_owned(), "back".to_owned())
+            .render();
+
+
+        f.render_stateful_widget(main_window, chunks[0], &mut data.list_state);
+        f.render_widget(controls, chunks[1]);
+    }
+
     /**
      * Conversation
      */