NumbersPuzle, activity_wellcome.xml, 09.10.2021

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="6dp"
    android:background="#2CFF6F00"
    android:orientation="vertical"
    tools:context=".WellcomeActivity">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="4"
        android:scaleType="fitXY"
        app:srcCompat="@android:drawable/btn_star_big_on" />

    <Button
        android:id="@+id/btnEasy"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:onClick="startGame"
        android:text="Easy" />

    <Button
        android:id="@+id/btnMedium"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:onClick="startGame"
        android:text="Medium" />

    <Button
        android:id="@+id/btnHard"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:onClick="startGame"
        android:text="Hard" />
</LinearLayout>