diff --git a/src/main/java/sae/chuzzle/OptionsActivity.java b/src/main/java/sae/chuzzle/OptionsActivity.java
new file mode 100644
index 0000000..8d082cc
--- /dev/null
+++ b/src/main/java/sae/chuzzle/OptionsActivity.java
@@ -0,0 +1,41 @@
+package sae.chuzzle;
+
+import android.app.Activity;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.widget.CompoundButton;
+import android.widget.Switch;
+
+public class OptionsActivity extends Activity
+        implements CompoundButton.OnCheckedChangeListener {
+
+    private SharedPreferences prefs;
+    private Switch switchDaltonien;
+    private Switch switchHard;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_options);
+
+        prefs = getSharedPreferences("chuzzle_prefs", MODE_PRIVATE);
+
+        switchDaltonien = findViewById(R.id.switchDaltonien);
+        switchHard      = findViewById(R.id.switchHard);
+
+        switchDaltonien.setChecked(prefs.getBoolean("daltonien", false));
+        switchHard.setChecked(prefs.getBoolean("hard_mode", false));
+
+        switchDaltonien.setOnCheckedChangeListener(this);
+        switchHard.setOnCheckedChangeListener(this);
+    }
+
+    @Override
+    public void onCheckedChanged(CompoundButton bouton, boolean estCoche) {
+        if (bouton == switchDaltonien) {
+            prefs.edit().putBoolean("daltonien", estCoche).apply();
+        } else if (bouton == switchHard) {
+            prefs.edit().putBoolean("hard_mode", estCoche).apply();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/sae/chuzzle/SeedActivity.java b/src/main/java/sae/chuzzle/SeedActivity.java
new file mode 100644
index 0000000..50534b3
--- /dev/null
+++ b/src/main/java/sae/chuzzle/SeedActivity.java
@@ -0,0 +1,59 @@
+package sae.chuzzle;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+
+public class SeedActivity extends Activity implements View.OnClickListener {
+
+    private EditText etGraine;
+    private Button btnJouer;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_seed);
+
+        etGraine = findViewById(R.id.etGraine);
+        btnJouer = findViewById(R.id.btnJouer);
+
+        btnJouer.setOnClickListener(this);
+    }
+
+    @Override
+    public void onClick(View v) {
+        if (v == btnJouer) {
+            lancerPartieAvecGraine();
+        }
+    }
+
+    private void lancerPartieAvecGraine() {
+        String texte = etGraine.getText().toString().trim();
+
+        if (texte.isEmpty()) {
+            Toast.makeText(
+                    this,
+                    "Veuillez entrer une graine.",
+                    Toast.LENGTH_SHORT
+            ).show();
+            return;
+        }
+
+        long graine;
+
+        try {
+            graine = Long.parseLong(texte);
+        } catch (NumberFormatException e) {
+            graine = texte.hashCode();
+        }
+
+        Intent intent = new Intent(this, MainActivity.class);
+        intent.putExtra("graine", graine);
+        startActivity(intent);
+    }
+}
\ No newline at end of file
diff --git a/src/main/res/layout/activity_options.xml b/src/main/res/layout/activity_options.xml
new file mode 100644
index 0000000..6b59046
--- /dev/null
+++ b/src/main/res/layout/activity_options.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="48dp">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Options"
+        android:textSize="32sp"
+        android:textStyle="bold"
+        android:gravity="center"
+        android:layout_marginBottom="64dp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:layout_marginBottom="32dp">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Mode daltonien (symboles)"
+            android:textSize="18sp"/>
+
+        <Switch
+            android:id="@+id/switchDaltonien"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Hard mode (verrous)"
+            android:textSize="18sp"/>
+
+        <Switch
+            android:id="@+id/switchHard"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/src/main/res/layout/activity_seed.xml b/src/main/res/layout/activity_seed.xml
new file mode 100644
index 0000000..4ed8a38
--- /dev/null
+++ b/src/main/res/layout/activity_seed.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:gravity="center"
+    android:padding="48dp">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Entrez une graine"
+        android:textSize="24sp"
+        android:gravity="center"
+        android:layout_marginBottom="32dp"/>
+
+    <EditText
+        android:id="@+id/etGraine"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="Ex : 12345"
+        android:inputType="number"
+        android:layout_marginBottom="32dp"/>
+
+    <Button
+        android:id="@+id/btnJouer"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Jouer"/>
+
+</LinearLayout>
\ No newline at end of file