Game Development with Visual Programming - JSS 2 note

GAME DEVELOPMENT WITH VISUAL PROGRAMMING

Subject: Digital Technologies

Class: JSS 2

Term: Second Term

Week: 9

Topic: Game Development with Visual Programming

Duration: 80 Minutes (Double Period)

Learning Objectives

By the end of the lesson, students should be able to:

1. Explain the meaning of game development.
2. Define visual programming and identify its advantages.
3. Identify the main components of a simple computer game.
4. Explain how sprites, backdrops, events, loops and conditions are used in a game.
5. Develop a simple interactive game using Scratch or a similar visual programming tool.

1. Meaning of Game Development

Game development is the process of planning, designing, creating, testing and improving a game for a computer or another digital device.

Game development involves creating the characters, setting, rules, controls and objectives that make a game interesting and playable. Examples of digital games include:

• Car racing games.
• Maze games.
• Football games.
• Platform games in which characters jump over obstacles.
• Quiz games that test a player's knowledge.

2. Meaning of Visual Programming

Visual programming is a method of creating computer programs by arranging graphical blocks or visual elements instead of typing every instruction as text.

Visual programming makes programming easier for beginners because instructions are represented by blocks that can be connected to form a program. Scratch is an example of a visual programming environment. It allows learners to create animations, stories and interactive games by connecting programming blocks.

Advantages of Visual Programming

1. It is easy for beginners to understand.
2. It reduces typing errors associated with text-based code.
3. It allows users to see how instructions fit together.
4. It supports creativity and problem-solving.
5. It makes it easier to create animations and simple games.

3. Main Components of a Simple Game

Component	Meaning	Example in a Game
Sprites	Characters or objects that appear in a Scratch project.	A player, ball, car or enemy.
Backdrop	The background or setting of the game.	A road, football field or maze.
Events	Instructions that start actions when something happens.	Starting a game when the green flag is clicked.
Controls	Methods used by a player to interact with the game.	Using arrow keys to move a character.
Conditions	Rules that allow a program to make decisions.	Checking whether a player touches an obstacle.
Loops	Structures that repeat instructions.	Continuously checking the player's movement.
Variables	Named storage locations for values that may change.	A score or number of lives remaining.

4. Steps in Developing a Simple Game

Step 1: Plan the Game

Decide what the player will do, the game's objective and how the player can win or lose. For example, in a catching game, the player controls a basket and tries to catch falling objects.

Step 2: Choose the Sprites and Backdrop

Select or create the characters and background needed for the game.

Step 3: Create the Controls

Decide how the player will control the character. In Scratch, the arrow keys can be used to move a sprite.

Step 4: Add the Game Rules

Use conditions to decide what happens when certain events occur. For example, the score may increase when the player catches an object.

Step 5: Add Repetition

Use loops to repeat actions, such as checking whether an object has been caught or moving an object across the screen.

Step 6: Test and Improve the Game

Run the game to check whether the controls and rules work correctly. Correct errors and improve the game where necessary.

5. Practical Activity: Creating a Simple Catching Game in Scratch

Objective: Create a simple game in which a player moves a sprite to catch an object and earns points.

Materials Required

• A computer with Scratch available.
• A player sprite, such as a basket or character.
• An object sprite to catch.
• A suitable backdrop.

Activity A: Create the Player Controls

1. Open Scratch and create a new project.
2. Choose a sprite to serve as the player.
3. Use an event block to start the program when the green flag is clicked.
4. Use conditional blocks to check whether the left or right arrow key is pressed.
5. Move the player sprite left or right when the corresponding key is pressed.

Example Logic

When green flag clicked
Forever
    If right arrow key is pressed
        Change x position by 10
    If left arrow key is pressed
        Change x position by -10

The example above describes the program's logic. In Scratch, students should assemble the corresponding event, loop, condition, key-sensing and movement blocks.

Activity B: Add the Object and Score

1. Add a second sprite to act as the falling object.
2. Create a variable named Score.
3. Set the score to zero when the game starts.
4. Make the object move downwards repeatedly.
5. Use a touching condition to check whether the object touches the player.
6. When the object is caught, increase the score by one and return the object to its starting position.
7. Run the game and check whether the score changes correctly.

Important: The falling object should return to its starting position after being caught. Otherwise, the player may keep receiving points without catching the object again.

6. Uses of Visual Programming in Game Development

• Education: Creating quiz games and learning activities.
• Entertainment: Developing simple racing, maze and catching games.
• Creativity: Designing characters, backgrounds and game rules.
• Problem-solving: Learning how to plan instructions and correct errors.
• Learning programming: Understanding events, conditions, loops and variables.

7. Summary

• Game development involves designing, creating, testing and improving games.
• Visual programming uses graphical blocks to construct programs.
• Scratch is a visual programming environment suitable for creating simple games.
• Sprites, backdrops, events, controls, conditions, loops and variables are important components of many games.
• Testing helps developers find errors and improve gameplay.

8. Evaluation Questions

1. What is game development?
2. Define visual programming.
3. Give two advantages of visual programming.
4. What is a sprite in Scratch?
5. State three components of a simple computer game.
6. What is the purpose of a variable in a game?
7. How can a condition be used in a catching game?
8. Why should a game be tested before it is considered complete?

9. Assignment

1. Explain five steps involved in developing a simple computer game.
2. List five components of a Scratch game and state the function of each.
3. Draw a flowchart or write the steps for a game in which a player catches a falling object.
4. Explain how a score variable can make a game more interesting.
5. Suggest two improvements that could be made to a simple catching game.

10. Interactive Revision Quiz

Select one answer for each question, then click Mark Quiz to see your score.

1. What is game development?

Typing only letters on a keyboard Planning, creating, testing and improving a game Repairing a computer monitor Printing a document

2. Which of these is a visual programming environment?

Scratch Calculator only Paint only File Explorer

3. What is a sprite in Scratch?

A computer cable A type of printer A character or object in a project A spreadsheet cell

4. Which component represents the background of a Scratch game?

Variable Backdrop Condition Loop

5. Which programming structure repeats instructions?

Loop Backdrop Sprite Costume

6. What is the purpose of a condition in a game?

To change the monitor size To print the game To make decisions based on whether something is true To turn off the keyboard

7. Which variable could be used to record a player's points?

Backdrop Score Sprite Green flag

8. What should a developer do after creating a game?

Never run it Delete all the sprites Ignore errors Test it and correct errors

9. Which event can be used to start a Scratch game?

When the green flag is clicked When the computer is unplugged When the monitor is removed When a printer runs out of paper

10. Why is visual programming useful for beginners?

It removes the need to think logically It makes every game automatically correct It uses graphical blocks to make program instructions easier to understand It works only without a computer