diff --git a/crates/prometeu-core/src/firmware/firmware.rs b/crates/prometeu-core/src/firmware/firmware.rs
index 8a6e2c3c..5d1bb38d 100644
--- a/crates/prometeu-core/src/firmware/firmware.rs
+++ b/crates/prometeu-core/src/firmware/firmware.rs
@@ -1,4 +1,4 @@
-use crate::firmware::firmware_state::{FirmwareState, InitAppStep, ResetStep};
+use crate::firmware::firmware_state::{FirmwareState, LoadGameStep, ResetStep};
 use crate::firmware::prometeu_context::PrometeuContext;
 use crate::hardware::{HardwareBridge, InputSignals};
 use crate::model::Cartridge;
@@ -59,8 +59,8 @@ impl Firmware {
             FirmwareState::SplashScreen(s) => s.on_enter(&mut req),
             FirmwareState::LaunchHub(s) => s.on_enter(&mut req),
             FirmwareState::HubHome(s) => s.on_enter(&mut req),
-            FirmwareState::LoadApp(s) => s.on_enter(&mut req),
-            FirmwareState::AppRunning(s) => s.on_enter(&mut req),
+            FirmwareState::LoadGame(s) => s.on_enter(&mut req),
+            FirmwareState::GameRunning(s) => s.on_enter(&mut req),
             FirmwareState::AppCrashes(s) => s.on_enter(&mut req),
         }
     }
@@ -78,8 +78,8 @@ impl Firmware {
             FirmwareState::SplashScreen(s) => s.on_update(&mut req),
             FirmwareState::LaunchHub(s) => s.on_update(&mut req),
             FirmwareState::HubHome(s) => s.on_update(&mut req),
-            FirmwareState::LoadApp(s) => s.on_update(&mut req),
-            FirmwareState::AppRunning(s) => s.on_update(&mut req),
+            FirmwareState::LoadGame(s) => s.on_update(&mut req),
+            FirmwareState::GameRunning(s) => s.on_update(&mut req),
             FirmwareState::AppCrashes(s) => s.on_update(&mut req),
         }
     }
@@ -97,14 +97,14 @@ impl Firmware {
             FirmwareState::SplashScreen(s) => s.on_exit(&mut req),
             FirmwareState::LaunchHub(s) => s.on_exit(&mut req),
             FirmwareState::HubHome(s) => s.on_exit(&mut req),
-            FirmwareState::LoadApp(s) => s.on_exit(&mut req),
-            FirmwareState::AppRunning(s) => s.on_exit(&mut req),
+            FirmwareState::LoadGame(s) => s.on_exit(&mut req),
+            FirmwareState::GameRunning(s) => s.on_exit(&mut req),
             FirmwareState::AppCrashes(s) => s.on_exit(&mut req),
         }
     }
     
     pub fn load_cartridge(&mut self, cartridge: Cartridge) {
-        self.state = FirmwareState::LoadApp(InitAppStep { cartridge });
+        self.state = FirmwareState::LoadGame(LoadGameStep { cartridge });
         self.state_initialized = false;
     }
 }
\ No newline at end of file
diff --git a/crates/prometeu-core/src/firmware/firmware_state.rs b/crates/prometeu-core/src/firmware/firmware_state.rs
index cc466e52..c2e36478 100644
--- a/crates/prometeu-core/src/firmware/firmware_state.rs
+++ b/crates/prometeu-core/src/firmware/firmware_state.rs
@@ -2,8 +2,8 @@ pub use crate::firmware::firmware_step_reset::ResetStep;
 pub use crate::firmware::firmware_step_splash_screen::SplashScreenStep;
 pub use crate::firmware::firmware_step_launch_hub::LaunchHubStep;
 pub use crate::firmware::firmware_step_hub_home::HubHomeStep;
-pub use crate::firmware::firmware_step_init_app::InitAppStep;
-pub use crate::firmware::firmware_step_run_app::RunAppStep;
+pub use crate::firmware::firmware_step_load_game::LoadGameStep;
+pub use crate::firmware::firmware_step_game_running::GameRunningStep;
 pub use crate::firmware::firmware_step_crash_screen::AppCrashesStep;
 
 #[derive(Debug, Clone)]
@@ -12,7 +12,7 @@ pub enum FirmwareState {
     SplashScreen(SplashScreenStep),
     LaunchHub(LaunchHubStep),
     HubHome(HubHomeStep),
-    AppRunning(RunAppStep),
-    LoadApp(InitAppStep),
+    LoadGame(LoadGameStep),
+    GameRunning(GameRunningStep),
     AppCrashes(AppCrashesStep),
 }
\ No newline at end of file
diff --git a/crates/prometeu-core/src/firmware/firmware_step_run_app.rs b/crates/prometeu-core/src/firmware/firmware_step_game_running.rs
similarity index 90%
rename from crates/prometeu-core/src/firmware/firmware_step_run_app.rs
rename to crates/prometeu-core/src/firmware/firmware_step_game_running.rs
index af8d1d14..ad995295 100644
--- a/crates/prometeu-core/src/firmware/firmware_step_run_app.rs
+++ b/crates/prometeu-core/src/firmware/firmware_step_game_running.rs
@@ -2,9 +2,9 @@ use crate::firmware::firmware_state::{AppCrashesStep, FirmwareState};
 use crate::firmware::prometeu_context::PrometeuContext;
 
 #[derive(Debug, Clone)]
-pub struct RunAppStep;
+pub struct GameRunningStep;
 
-impl RunAppStep {
+impl GameRunningStep {
     pub fn on_enter(&mut self, _ctx: &mut PrometeuContext) {}
 
     pub fn on_update(&mut self, ctx: &mut PrometeuContext) -> Option<FirmwareState> {
diff --git a/crates/prometeu-core/src/firmware/firmware_step_init_app.rs b/crates/prometeu-core/src/firmware/firmware_step_load_game.rs
similarity index 70%
rename from crates/prometeu-core/src/firmware/firmware_step_init_app.rs
rename to crates/prometeu-core/src/firmware/firmware_step_load_game.rs
index e14690f7..58b4a918 100644
--- a/crates/prometeu-core/src/firmware/firmware_step_init_app.rs
+++ b/crates/prometeu-core/src/firmware/firmware_step_load_game.rs
@@ -1,19 +1,19 @@
-use crate::firmware::firmware_state::{FirmwareState, RunAppStep};
+use crate::firmware::firmware_state::{FirmwareState, GameRunningStep};
 use crate::firmware::prometeu_context::PrometeuContext;
 use crate::model::Cartridge;
 
 #[derive(Debug, Clone)]
-pub struct InitAppStep {
+pub struct LoadGameStep {
     pub cartridge: Cartridge,
 }
 
-impl InitAppStep {
+impl LoadGameStep {
     pub fn on_enter(&mut self, ctx: &mut PrometeuContext) {
         ctx.os.initialize_vm(ctx.vm, &self.cartridge);
     }
 
     pub fn on_update(&mut self, _ctx: &mut PrometeuContext) -> Option<FirmwareState> {
-        Some(FirmwareState::AppRunning(RunAppStep))
+        Some(FirmwareState::GameRunning(GameRunningStep))
     }
 
     pub fn on_exit(&mut self, _ctx: &mut PrometeuContext) {}
diff --git a/crates/prometeu-core/src/firmware/mod.rs b/crates/prometeu-core/src/firmware/mod.rs
index 7f2761bf..62c8f988 100644
--- a/crates/prometeu-core/src/firmware/mod.rs
+++ b/crates/prometeu-core/src/firmware/mod.rs
@@ -5,8 +5,8 @@ pub(crate) mod firmware_step_reset;
 pub(crate) mod firmware_step_splash_screen;
 pub(crate) mod firmware_step_launch_hub;
 pub(crate) mod firmware_step_hub_home;
-pub(crate) mod firmware_step_init_app;
-pub(crate) mod firmware_step_run_app;
+pub(crate) mod firmware_step_load_game;
+pub(crate) mod firmware_step_game_running;
 pub(crate) mod firmware_step_crash_screen;
 mod prometeu_context;
 
diff --git a/crates/prometeu-core/src/model/cartridge.rs b/crates/prometeu-core/src/model/cartridge.rs
index 1074be99..a721d150 100644
--- a/crates/prometeu-core/src/model/cartridge.rs
+++ b/crates/prometeu-core/src/model/cartridge.rs
@@ -3,6 +3,8 @@ use crate::virtual_machine::Program;
 #[derive(Debug, Clone)]
 pub struct AppHeader {
     pub app_id: String,
+    pub magic: u32,
+    pub version: u16,
     pub title: String,
     pub entrypoint: u32,
 }