You are in a rocketship trying to get back to Earth from exploring the moon. But some evil space aliens spotted you and are trying to prevent you from getting home. Use your mouse to guide your rocketship around the aliens. Collect 10 stars to advance to the next level. Once you have 20 stars, move your rocketship to Earth to complete the game and return home safely! :)
I used the Star Hunter instructions in the book "Coding Games in Scratch" to do the basic layout (ex. collisions, what the enemies do) and then I added more code to make it space-themed and use the storyline above in the instructions. This is the most complicated project/game I've worked on.