We will be creating a spaceship that simulates real movements in space.

The spaceship will fire a laser beam that can destroy targets.

The spaceship will be able to pass through the edges of the screen

Controls: Up arrow will provide forward thrust Right and left arrows will turn the ship

Since we are going to be creating a spaceship, set the stage background to be stars.

It can be found in the Nature folder.

Draw a Spaceship sprite.

Make sure you point the ship to the right.

Make two costumes, one with flames and one without.

Create the following VariablesVariables: (For this sprite only)

DirectionChangeNewXNewYThrust

We need to create three event scripts:

Up ArrowRight ArrowLeft Arrow

We will begin with the Up Arrow script.

Drag a when Space when Space Key pressedKey pressed block to the Ship sprite script area and change it to up arrow.

Connect a repeat untilrepeat until block to the when up when up arrow key pressedarrow key pressed block.

Under Operators, drag an notnot operator block into the repeat repeat untiluntil block.

Go to Sensing and put a key up arrow key up arrow pressed?pressed? block into the notnot block.

Put a next costumenext costume block in the repeat repeat until until block.

Put three change change DirectionChange byDirectionChange by blocks into the repeat untilrepeat until block.

Change the variables to Thrust, NewX, and NewY

Put a value of 0.1 in the change Thrustchange Thrust by by block.

Drag two multiplicationmultiplication operator blocks into the script area.

Put the ThrustThrust variable block into the left side of both multiplicationmultiplication operator blocks.

Put a sqrt of 10sqrt of 10 block on the right side of each multiplicationmultiplication block.

Change one of the sqrt of 10sqrt of 10 blocks to sin of 10sin of 10

Change the other sqrt of 10sqrt of 10 block to cos of 10cos of 10

Put the ThrustThrust * sin * sin of 10of 10 block into the change NewX by change NewX by block.

Put the ThrustThrust * cos * cos by 10by 10 block into the change NewYchange NewY block

Go to motion and put a directiondirection block into the sin ofsin of and cos of cos of blocks.

Put a switch to switch to costume NoFlamescostume NoFlames block underneath the repeat until repeat until not not key up arrow key up arrow pressed?pressed? block.

Put a set Thrust to 0set Thrust to 0 block under the switch to costume switch to costume NoFlamesNoFlames block.

Now that we have finished the Up Arrow scripts, we need to do the Right Arrow script and Left Arrow script.

Create a when right when right arrow key pressedarrow key pressed block and connect the blocks as shown in the image to it.

Create a duplicate of the when right when right arrow key pressedarrow key pressed blocks by right clicking the when when right arrow key right arrow key pressedpressed block and clicking duplicate.

Alter this newly duplicated block so it matches the image to the right.

Up, Right, and Left represent the user controls for the ship.

However, the ship will not move until we put the Action code for the computer to take the commands and translate them to movement.

Create a when Green when Green Flag clickedFlag clicked block and connect the specified blocks as shown in the image to the right.

Create another when when Green Flag clickedGreen Flag clicked block and connect the blocks as shown in the image to the right.

This will reset the variables and allow the ship to pass through the edges of the screen.

Click the Green flag and test your ship!

We want a laser beam to travel to a target and then stop traveling when it hits a target.

We also want the laser beam to go back to the ship and hide when not being fired.

Click Paint New Sprite and draw a laser beam.

Create the variables as shown in the image to the right for the Laser sprite.

Create a new when when Green Flag clickedGreen Flag clicked block and connect the blocks as shown in the image to the right to it.

This allows the laser beam to travel a set distance and check its status (fire or not fired)

Create a new when when space key pressed space key pressed block and connect the blocks as shown in the image to the right to it.

This makes it so when the laser is fired, it’s fired in the same direction the ship is facing.

Test your laser beam!

Our final step is to create targets for our space ship to shoot at.

Create a new Sprite.

For this newly created sprite, create a new when Green Flag clicked block and connect the blocks as shown in the image to the right.

This will glide the target sprite around in random directions.

Complete the when Green Flag clicked block by connecting the additional blocks as shown in the image to the right.

This will now cause the sprite to disappear and re-appear if it is hit by the laser beam.

Congratulations! You’ve finished creating your own space ship game.

See the next slide for challenges.

Play a sound every time the laser beam is fired and whenever the laser successfully hits a target.

Add a score feature that increments when the laser beam hits the target and decrements when the target hits the space ship.

Add more targetsImplement your own creative features!