diff --git a/src/App.scss b/src/App.scss
index eeaf8dd..0490aee 100644
--- a/src/App.scss
+++ b/src/App.scss
@@ -74,6 +74,8 @@
 .school {
   grid-area: school;
   padding: 1rem;
+
+  overflow-y: auto;
 }
 
 .unit {
diff --git a/src/App.tsx b/src/App.tsx
index 9affcc4..4a67284 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -7,6 +7,8 @@ import { DebugView } from './views/DebugView'
 
 export const App = observer(function () {
 
+  console.dir(performance.now());
+
   return (
     <div className="App">
       <StatsView />
diff --git a/src/model/calendar.ts b/src/model/calendar.ts
index 4dcc272..ed53a41 100644
--- a/src/model/calendar.ts
+++ b/src/model/calendar.ts
@@ -37,6 +37,7 @@ export class Calendar {
     public static deserialize(data: CalendarDto): Calendar {
         const calendar = new Calendar();
 
+        calendar.day = data.day;
         calendar.progress = Progress.deserialize(data.progress, true, calendar.handleProgress.bind(calendar));
 
         return calendar;
diff --git a/src/model/game.ts b/src/model/game.ts
index 74627b3..ec83f55 100644
--- a/src/model/game.ts
+++ b/src/model/game.ts
@@ -10,6 +10,10 @@ export class Game {
         makeAutoObservable(this);
     }
 
+    public restart() {
+        this.school = new School();
+    }
+
     public save(): void {
         const data = this.school.serialize();
         localStorage.setItem('save', JSON.stringify(data))
diff --git a/src/model/school.ts b/src/model/school.ts
index cb065be..a45d3d0 100644
--- a/src/model/school.ts
+++ b/src/model/school.ts
@@ -6,7 +6,7 @@ import { Upgrades } from './upgrades';
 import { PartialResourceSet, ResourceSet } from '../types/resources';
 import { addResourceSets, fullResourceSet, multiplyResourceSet, roundResourceSet, subtractResourceSets } from '../utils/resources';
 import { v7 as uuid } from 'uuid';
-import { GameClock } from '../utils/gameClock';
+import { GameClock, nowTime } from '../utils/gameClock';
 import { Calendar, CalendarDto } from './calendar';
 import { getRandomHumanName } from '../utils/humanNames';
 import { Time as Time } from './time';
@@ -50,12 +50,10 @@ export class School {
     }
 
     public tick(time: number) {
-        const scaledTime = time;
-
-        this.calendar.progress.tick(scaledTime);
+        this.calendar.progress.tick(time);
 
         for (let unit of this.units)
-            unit.progress.tick(scaledTime);
+            unit.progress.tick(time);
 
         this.tps = GameClock.tps;
     }
diff --git a/src/prefabs/upgrades.ts b/src/prefabs/upgrades.ts
index 43bd79e..424e71e 100644
--- a/src/prefabs/upgrades.ts
+++ b/src/prefabs/upgrades.ts
@@ -18,10 +18,10 @@ export const upgrades: UpgradePrefab[] = [
     {
         id: 'moreStudents',
         name: "Больше учеников",
-        description: (level) => `Увеличить количество учеников с ${level} до ${level + 1}`,
+        description: (level) => `Увеличить количество учеников с ${level + 1} до ${level + 2}`,
         costToView: (level) => fullResourceSet(),
         costToOpen: (level) => ({ reputation: 20 * (level / 10 + 1) }),
-        costToBuy: (level) => ({ gold: 10 }),
+        costToBuy: (level) => ({ gold: 10 * (level + 1) }),
         execute: (level) => {
             game.school.increaseStudentCount();
         },
diff --git a/src/utils/gameClock.ts b/src/utils/gameClock.ts
index af9009c..13267fa 100644
--- a/src/utils/gameClock.ts
+++ b/src/utils/gameClock.ts
@@ -1,6 +1,10 @@
 import { game } from "../model/game";
 import { ExternalSignal } from "./mobx/externalSignal";
 
+export function nowTime() {
+    return performance.timeOrigin + performance.now();
+}
+
 export class GameClock {
 
     public static lastTime = 0;
@@ -9,27 +13,18 @@ export class GameClock {
 
     public static readonly pausedSignal = new ExternalSignal('GameClock.paused');
 
-    // public static async start(): Promise<void> {
-    //     let lastTime = performance.now();
-
-    //     setInterval(() => {
-    //         let now = performance.now();
-    //         let delta = now - lastTime;
-
-    //         school.tick(delta / 1000);
-
-    //         lastTime = now;
-    //     }, 33);
-    // }
-
     public static start(): void {
-        const loop = (now: number) => {
+        this.lastTime = nowTime();
+
+        const loop = () => {
+            if (GameClock.paused)
+                return;
+
+            let now = nowTime();
+
             let delta = now - GameClock.lastTime;
             GameClock.lastTime = now;
 
-            if (GameClock.paused)
-                delta *= 0;
-
             GameClock.frames.push(now);
             while (GameClock.frames[0] < now - 1000)
                 GameClock.frames.shift();
@@ -63,12 +58,20 @@ export class GameClock {
     }
 
     public static pause() {
+        if (GameClock.paused)
+            return;
+        
         GameClock.paused = true;
         GameClock.pausedSignal.trigger();
     }
 
     public static resume() {
+        if (!GameClock.paused)
+            return;
+
         GameClock.paused = false;
         GameClock.pausedSignal.trigger();
+
+        GameClock.start();
     }
 }
diff --git a/src/views copy/UnitListView.tsx b/src/views copy/UnitListView.tsx
deleted file mode 100644
index 27a782b..0000000
--- a/src/views copy/UnitListView.tsx	
+++ /dev/null
@@ -1,22 +0,0 @@
-import { observer } from "mobx-react-lite";
-import { school } from "../model/school";
-import { Student } from "../model/student";
-import { Owner } from "../model/owner";
-import { OwnerUnitView } from "./OwnerUnitView";
-import { IUnit } from "../types/unit";
-
-export const UnitListView = observer(function () {
-
-    function renderUnit(unit: IUnit) {
-        if (unit instanceof Owner)
-            return <OwnerUnitView unit={unit} />
-        // // else if (unit instanceof Student)
-        //     // return StudentView({ unit });
-        else
-            return '???';
-    }
-
-    return <ul>{
-        school.units.map((unit) => <li className="unit" key={unit.id}>{renderUnit(unit)}</li>)
-    }</ul>
-});
diff --git a/src/views/DebugView.tsx b/src/views/DebugView.tsx
index de882e9..8b646ca 100644
--- a/src/views/DebugView.tsx
+++ b/src/views/DebugView.tsx
@@ -7,6 +7,10 @@ export const DebugView = observer(function () {
 
     const [skipTime, setSkipTime] = useState<number>(5);
 
+    const isDebugMode = location.hostname === "localhost" ||
+        location.hostname === "127.0.0.1" ||
+        location.hostname === "[::1]";
+
     function handleTimeScaleChange(event: ChangeEvent<HTMLInputElement>): void {
         game.school.time.setTimeScale(Number(event.target.value));
     }
@@ -15,6 +19,10 @@ export const DebugView = observer(function () {
         GameClock.skipTime(skipTime);
     }
 
+    function handleRestartClick(): void {
+        game.restart();
+    }
+
     function handleSaveClick(): void {
         game.save();
     }
@@ -22,6 +30,7 @@ export const DebugView = observer(function () {
     function handleLoadClick(): void {
         game.school.time.pause();
         game.load();
+        game.school.time.resume();
     }
 
     function handleTickClick(): void {
@@ -32,31 +41,40 @@ export const DebugView = observer(function () {
     return <div className="debug">
         <div>
             Время
-            <div className="timeScale">
-                Масштаб
-                <input
-                    type="range"
-                    min={1}
-                    max={100}
-                    step={1}
-                    value={game.school.time.timeScale}
-                    onChange={handleTimeScaleChange}
-                    style={{ width: '100%' }}
-                />
-                x{game.school.time.timeScale}
-            </div>
+            {
+                isDebugMode
+                    ? <div className="timeScale">
+                        Масштаб
+                        <input
+                            type="range"
+                            min={1}
+                            max={100}
+                            step={1}
+                            value={game.school.time.timeScale}
+                            onChange={handleTimeScaleChange}
+                            style={{ width: '100%' }}
+                        />
+                        x{game.school.time.timeScale}
+                    </div>
+                    : <></>
+            }
             {
                 game.school.time.paused
-                ? <button onClick={() => game.school.time.resume()}>|&gt;</button>
-                : <button onClick={() => game.school.time.pause()}>||</button>
+                    ? <button onClick={() => game.school.time.resume()}>|&gt;</button>
+                    : <button onClick={() => game.school.time.pause()}>||</button>
+            }
+            {
+                isDebugMode
+                    ? <button onClick={handleSkipTime}>
+                        <input type="number" value={skipTime} onChange={(e) => setSkipTime(Number(e.target.value))}></input>
+                        Пропустить
+                    </button>
+                    : <></>
             }
-            <button onClick={handleSkipTime}>
-                <input type="number" value={skipTime} onChange={(e) => setSkipTime(Number(e.target.value))}></input>
-                Пропустить
-            </button>
             <button onClick={handleTickClick}>Tick</button>
         </div>
         <div>
+            <button onClick={handleRestartClick}>Restart</button>
             <button onClick={handleSaveClick}>Save</button>
             <button onClick={handleLoadClick}>Load</button>
         </div>
diff --git a/src/views/UnitListView.tsx b/src/views/UnitListView.tsx
index 3b5dd5a..da084ee 100644
--- a/src/views/UnitListView.tsx
+++ b/src/views/UnitListView.tsx
@@ -8,15 +8,6 @@ import { game } from "../model/game";
 
 export const UnitListView = observer(function () {
 
-    function renderUnit(unit: IUnit) {
-        if (unit instanceof Owner)
-            return <OwnerUnitView unit={unit} />
-        else if (unit instanceof Student)
-            return <StudentUnitView unit={unit} />
-        else
-            return '???';
-    }
-
     return <div className="units">
         <div className="owner">
             <OwnerUnitView unit={game.school.owner} />