1- Open Scratch that is an orange cat, is a program to create video games.
2- When you had opened you have to select the orange cat and click on it with the right buttom of your mouse and then delete. To get a new one go to new sprite and click on chose sprite from library, go to theme, select space and click spaceship, click on it twice. Go to shrinkto decrease the size and click several times on the spaceship.
3- Go to events and select the green flag , then drop it on the other side also you have to go to control and click on if then.
4- Then go to sensings and select the key and put it on the top of if then. Go to space and click on the right arrow also you have to go to motion and select change x by 10 and drop it inside if then.
5- Go again to control and click on forever, then you have to connect it to if then and now you can move the spaceship to the right.
6- The next thing is to select the green flag and click on it with the right button and copy. Then put -10 instead of 10 in change x by 10 and in the right arrow left arrow and now you can move it to the left and right.
7- To move the spaceship up and down you have to copy, then you have to delete change by x and put change by y and put up arrow instead of left arrow and -10, do the same to go down but you have to put down arrow and 10.
8- Go to new sprite and select the brush then click on the rectangle and draw it in green and smaller than the spaceship in the point of the middle.
9- Select the rectangle, go to scripts .
10- To move the green bar go to events, select the green flag, then go to control and select forever and click on if then and also click on repeat until and drop it on the right side.
11- Then go to sensings and and select the key. You have to put the key on if then.
12- Go to motion and click on go to x: y: and Put in it inside the last change. Go to sensing and click on x: y: position of Sprite1 two times and put it inside of the go to x: y: and write spaceship instead of sprite 1.
13- Then go to looks, select show and drop it below go to x: y: and inside of if then.
14- To copy you have to cover over go to, use the right button of your mouse and copy, duplicate the structure only of go to and show, and connect it to the green flag, delete show and instead of it we will replace it with hide that is on looks.
15- Take the forever and put it under hide and then put all the other elements inside forever (if then, go to x: y:, show, repeat until, go to x: y: and hide).
16- Then go to motion and select change y by 10 so when you click on space bar it goes up. Copy go to x: y:and hide and put it under repeat until.
17- To chose the enemy go to chose sprite from library and select the starfish, go to shrink and click on the starfish several times until it gets smaller than the spaceship.
IT SHOULD LOOK LIKE THESE