diff --git a/firmware/application/external/doom/Arial12x12.h b/firmware/application/external/doom/Arial12x12.h
deleted file mode 100644
index 4dc451eeb..000000000
--- a/firmware/application/external/doom/Arial12x12.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (C) 2024 Mark Thompson
- *
- * This file is part of PortaPack.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street,
- * Boston, MA 02110-1301, USA.
- */
-
-// dummy include file to avoid changing original source
-
-#ifndef __UI_Arial12x12_H__
-#define __UI_Arial12x12_H__
-
-#define Arial12x12 (0)
-
-#endif /*__UI_Arial12x12_H__*/
diff --git a/firmware/application/external/doom/SPI_TFT_ILI9341.h b/firmware/application/external/doom/SPI_TFT_ILI9341.h
deleted file mode 100644
index 8e1bbd59c..000000000
--- a/firmware/application/external/doom/SPI_TFT_ILI9341.h
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef __UI_SPI_TFT_ILI9341_H__
-#define __UI_SPI_TFT_ILI9341_H__
-
-ui::Painter painter;
-
-enum {
-    White,
-    Blue,
-    Yellow,
-    Purple,
-    Green,
-    Red,
-    Maroon,
-    Orange,
-    Black,
-};
-
-static const Color pp_colors[] = {
-    Color::white(),
-    Color::blue(),
-    Color::yellow(),
-    Color::purple(),
-    Color::green(),
-    Color::red(),
-    Color::magenta(),
-    Color::orange(),
-    Color::black(),
-};
-
-#endif /*__UI_SPI_TFT_ILI9341_H__*/
\ No newline at end of file
diff --git a/firmware/application/external/doom/mbed.h b/firmware/application/external/doom/mbed.h
deleted file mode 100644
index f2ee47d63..000000000
--- a/firmware/application/external/doom/mbed.h
+++ /dev/null
@@ -1,81 +0,0 @@
-#ifndef __UI_mbed_H__
-#define __UI_mbed_H__
-
-using Callback = void (*)(void);
-
-#define wait_us(x) (void)0
-#define wait(x) chThdSleepMilliseconds(x * 1000)
-#define PullUp 1
-
-#include "ui_navigation.hpp"
-
-enum {
-    dp0,
-    dp1,
-    dp2,
-    dp3,
-    dp4,
-    dp5,
-    dp6,
-    dp7,
-    dp8,
-    dp9,
-    dp10,
-    dp11,
-    dp12,
-    dp13,
-    dp14,
-    dp15,
-    dp16,
-    dp17,
-    dp18,
-    dp19,
-    dp20,
-    dp21,
-    dp22,
-    dp23,
-    dp24,
-    dp25,
-};
-
-class Timer {
-   public:
-    Timer() { (void)0; };
-    void reset() { (void)0; };
-    void start() { (void)0; }
-    uint32_t read_ms() { return 1000; };
-
-   private:
-};
-
-static Callback game_update_callback;
-static uint32_t game_update_timeout;
-
-class Ticker {
-   public:
-    Ticker() { (void)0; };
-    void attach(Callback func, double delay_sec) {
-        game_update_callback = func;
-        game_update_timeout = delay_sec * 60;
-    }
-    void detach() {
-        game_update_callback = nullptr;
-    }
-
-   private:
-};
-
-static Callback button_callback;
-
-class InterruptIn {
-   public:
-    InterruptIn(int reg) {
-        (void)reg;
-    };
-    void fall(Callback func) { button_callback = func; };
-    void mode(int v) { (void)v; };
-
-   private:
-};
-
-#endif /*__UI_mbed_H__*/
\ No newline at end of file
diff --git a/firmware/application/external/doom/ui_doom.cpp b/firmware/application/external/doom/ui_doom.cpp
index 61af21d84..8416a8861 100644
--- a/firmware/application/external/doom/ui_doom.cpp
+++ b/firmware/application/external/doom/ui_doom.cpp
@@ -8,8 +8,6 @@
 
 #include "ui_doom.hpp"
 #include "ui.hpp"
-#include "SPI_TFT_ILI9341.h"
-#include "mbed.h"
 
 #define SCREEN_WIDTH 240
 #define SCREEN_HEIGHT 320
diff --git a/firmware/application/external/doom/ui_doom.hpp b/firmware/application/external/doom/ui_doom.hpp
index 0515073cf..b07d96bfd 100644
--- a/firmware/application/external/doom/ui_doom.hpp
+++ b/firmware/application/external/doom/ui_doom.hpp
@@ -14,6 +14,49 @@
 #include "message.hpp"
 
 namespace ui::external_app::doom {
+using Callback = void (*)();
+
+class Ticker {
+   public:
+    Ticker() {}
+    void attach(Callback func, double delay_sec) {
+        game_update_callback = func;
+        game_update_timeout = delay_sec * 60;
+    }
+    void detach() {
+        game_update_callback = nullptr;
+    }
+
+   private:
+    Callback game_update_callback = nullptr;
+    uint32_t game_update_timeout = 0;
+};
+
+extern ui::Painter painter;
+
+enum {
+    White,
+    Blue,
+    Yellow,
+    Purple,
+    Green,
+    Red,
+    Maroon,
+    Orange,
+    Black,
+};
+
+static const Color pp_colors[] = {
+    Color::white(),
+    Color::blue(),
+    Color::yellow(),
+    Color::purple(),
+    Color::green(),
+    Color::red(),
+    Color::magenta(),
+    Color::orange(),
+    Color::black(),
+};
 
 class DoomView : public View {
    public:
@@ -36,7 +79,6 @@ class DoomView : public View {
             this->frame_sync();
         }};
 };
-
 }  // namespace ui::external_app::doom
 
 #endif /*__UI_DOOM_H__*/
\ No newline at end of file