Я пытался сделать хоть что-нибудь

Tetris_task.pro

@@ -0,0 +1,30 @@
+QT       += core gui
+QT       += multimedia
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++11
+
+# You can make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+    main.cpp \
+    tetrixboard.cpp \
+    tetrixpiece.cpp \
+    tetrixwindow.cpp
+
+HEADERS += \
+    tetrixboard.h \
+    tetrixpiece.h \
+    tetrixwindow.h
+
+FORMS +=
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
+
+DISTFILES += \
+    Video_Game_Players_-_Tetris_Theme_48152782.mp3

main.cpp

@@ -1,10 +1,22 @@
-#include <QApplication>
-
-#include "tetris.h"
-
-int main(int argc, char *argv[]) {
-  QApplication a(argc, argv);
-  Tetris w;
-  w.show();
-  return a.exec();
-}
+#include "tetrixwindow.h"
+
+#include <QApplication>
+#include <QMediaPlayer>
+#include <QMediaPlaylist>
+#include <QDir>
+#include <QUrl>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    TetrixWindow window;
+    window.show();
+    QMediaPlaylist *playlist = new QMediaPlaylist();
+    playlist->addMedia(QUrl("qrc:/tetris_music/background.wav"));
+    playlist->setPlaybackMode(QMediaPlaylist::Loop);
+    QMediaPlayer *player = new QMediaPlayer;
+    player->setMedia(playlist);
+    player->setVolume(10);
+    player->play();
+    return app.exec();
+}

tetrisform.cpp

@@ -0,0 +1,14 @@
+#include "tetrisform.h"
+#include "ui_tetrisform.h"
+
+tetrisForm::tetrisForm(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::tetrisForm)
+{
+    ui->setupUi(this);
+}
+
+tetrisForm::~tetrisForm()
+{
+    delete ui;
+}

tetrismainwindow.cpp

@@ -0,0 +1,15 @@
+#include "tetrismainwindow.h"
+#include "ui_tetrismainwindow.h"
+
+TetrisMainWindow::TetrisMainWindow(QWidget *parent)
+    : QWidget(parent)
+    , ui(new Ui::TetrisMainWindow)
+{
+    ui->setupUi(this);
+}
+
+TetrisMainWindow::~TetrisMainWindow()
+{
+    delete ui;
+}
+

tetrismainwindow.h

@@ -0,0 +1,31 @@
+#ifndef TETRISMAINWINDOW_H
+#define TETRISMAINWINDOW_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class TetrisMainWindow; }
+QT_END_NAMESPACE
+
+class TetrisMainWindow : public QWidget
+{
+    Q_OBJECT
+
+public:
+    TetrisMainWindow(QWidget *parent = nullptr);
+    ~TetrisMainWindow();
+
+private:
+    Ui::TetrisMainWindow *ui;
+    QLabel *createLabel(const QString &text);
+
+    TetrisBoard *board;
+    QLabel *nextPieceLabel;
+    QLCDNumber *scoreLcd;
+    QLCDNumber *levelLcd;
+    QLCDNumber *linesLcd;
+    QPushButton *startButton;
+    QPushButton *quitButton;
+    QPushButton *pauseButton;
+};
+#endif // TETRISMAINWINDOW_H

tetrismainwindow.ui

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>TetrisMainWindow</class>
+ <widget class="QWidget" name="TetrisMainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>TetrisMainWindow</string>
+  </property>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>