diff --git a/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics.rs b/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics.rs
index a144ea4..b316a43 100644
--- a/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics.rs
+++ b/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics.rs
@@ -1,3 +1,2 @@
 pub mod math;
 pub mod rigid;
-pub mod simulation;
diff --git a/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics/simulation.rs b/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics/simulation.rs
deleted file mode 100644
index c081474..0000000
--- a/mods/dr_game/Difficult_Rocket_rs/src/src/dr_physics/simulation.rs
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * -------------------------------
- * Difficult Rocket
- * Copyright © 2020-2023 by shenjackyuanjie 3695888@qq.com
- * All rights reserved
- * -------------------------------
- */
-
-use pyo3::prelude::*;
-use rapier2d_f64::prelude::*;
-
-#[pyfunction]
-#[pyo3(name = "simulation")]
-pub fn simulation() {
-    let mut rigid_body_set = RigidBodySet::new();
-    let mut collider_set = ColliderSet::new();
-
-    /* Create the ground. */
-    let collider = ColliderBuilder::cuboid(100.0, 0.1).build();
-    let ball = ColliderBuilder::ball(10.0).build();
-    collider_set.insert(collider);
-    collider_set.insert(ball);
-
-    /* Create the bouncing ball. */
-    let rigid_body = RigidBodyBuilder::dynamic().translation(vector![0.0, 10.0]).build();
-    let collider = ColliderBuilder::ball(0.5).restitution(0.7).build();
-    let ball_body_handle = rigid_body_set.insert(rigid_body);
-    collider_set.insert_with_parent(collider, ball_body_handle, &mut rigid_body_set);
-
-    /* Create other structures necessary for the simulation. */
-    let gravity = vector![0.0, -9.81];
-    let integration_parameters = IntegrationParameters::default();
-    let mut physics_pipeline = PhysicsPipeline::new();
-    let mut island_manager = IslandManager::new();
-    let mut broad_phase = BroadPhase::new();
-    let mut narrow_phase = NarrowPhase::new();
-    let mut impulse_joint_set = ImpulseJointSet::new();
-    let mut multibody_joint_set = MultibodyJointSet::new();
-    let mut ccd_solver = CCDSolver::new();
-    let physics_hooks = ();
-    let event_handler = ();
-
-    /* Run the game loop, stepping the simulation once per frame. */
-    for _ in 0..200 {
-        physics_pipeline.step(
-            &gravity,
-            &integration_parameters,
-            &mut island_manager,
-            &mut broad_phase,
-            &mut narrow_phase,
-            &mut rigid_body_set,
-            &mut collider_set,
-            &mut impulse_joint_set,
-            &mut multibody_joint_set,
-            &mut ccd_solver,
-            None,
-            &physics_hooks,
-            &event_handler,
-        );
-
-        let ball_body = &rigid_body_set[ball_body_handle];
-        println!("Ball altitude: {} {}", ball_body.translation().x, ball_body.translation().y);
-    }
-}
-
-pub struct Simulator {
-    pub rigid_body_set: RigidBodySet,
-    pub collider_set: ColliderSet,
-    pub gravity: Vector<f64>,
-    pub integration_parameters: IntegrationParameters,
-    pub physics_pipeline: PhysicsPipeline,
-    pub island_manager: IslandManager,
-    pub broad_phase: BroadPhase,
-    pub narrow_phase: NarrowPhase,
-    pub impulse_joint_set: ImpulseJointSet,
-    pub multibody_joint_set: MultibodyJointSet,
-    pub ccd_solver: CCDSolver,
-    pub physics_hooks: (),
-    pub event_handler: (),
-}
-
-pub mod python {
-    use pyo3::prelude::*;
-    use rapier2d_f64::prelude::*;
-
-    #[pyclass]
-    pub struct PyIntegrationParameters {
-        pub data: IntegrationParameters,
-    }
-
-    #[pymethods]
-    impl PyIntegrationParameters {
-        #[new]
-        fn new() -> Self {
-            PyIntegrationParameters {
-                data: IntegrationParameters::default(),
-            }
-        }
-    }
-}