(upbeat music)
Hey and welcome to Scratch Games day six.
In today's club session you'll make a launching game.
While creating this game
you'll learn about an important
computer science concept, variables.
As well as a game creation concept, increasing difficulty.
In the game you'll make today
the player must launch and navigate a sprite across
a screen of bouncing enemies.
If the player reaches the finish line
a point it added to their score
and a new enemy is added to the game.
This game uses variables to make it more difficult.
You may have encountered variables in math class
like the x or y you solve for in algebra equations.
Variables in computer science are very similar.
A variable is a storage location for data.
When the code runs, it tells the computer
to replace the variable with data
from that storage location.
In many sports video games
you can easily see the values of some variables.
In a football game
each football player might have many different attributes
all of which are stored in variables.
In the game, the variable will hold the player's score.
As the players score gets higher
the game will get more difficult.
To get started, open the starter project link on this page.
Then, add a sprite that the player can control.
This example project will use a fish
but you can use any sprite you'd like for yours.
You will probably want to shrink the sprite
to make it a better size for this game.
Once you've done that move on to the next screencast.
(upbeat music)
