Space Invaders Game

I developed this program from scratch based on all design patterns learned after completing a course in Systematic Program Design at UBC. That curriculum is based on How to Design Programs

• By applying the fundamental approach in How to Design World, I implemented cores features of the classic Space Invaders game and designed some new game assets (e.g. explosion when a missile hits an invader, scoreboard, pop-up animation when an invader hits a spaceship)
• My approach to this personal project used top-down systematic design and thorough test-driven development at every step. The code is entirely written in Racket's Intermediate Student, a pure functional language. It also uses the How to design world framework for interactive programs and basic animations.

Features

Space Invaders game's features:

Space ship

• Move right and left at the bottom of the screen when respectively pressing the left and right arrow keys
• Fire missiles straight up from their current position when pressing the space bar

Invaders

• Appear randomly along the top of the screen and move at a 45-degree angle. When invaders hit a wall, they will bounce off and continue at a 45-degree angle in the other direction.
• When invaders hit the tank's shield which is a circle area around the tank, a "Boom" animation is popped up
• When invaders reach the screen bottom, the game is over and the "Game over" screen will be appeared

Missiles

• When missiles hit the invaders, both of them will be disappeared and the "Explosion" animation is popped up

Score

• Scoreboard on top of the game screen will be added by one when the missile hits the invader

Game play screen capture

Space ship fires missiles and when missiles hit invaders

Invaders collide the space ship and Game Over when invaders reach the end the screen

User Information

How to install DrRacket IDE and run from source code:

Install the latest version of DrRacket. Download the repository and open the space-invaders-main.rkt source file in DrRacket, then run the program by pressing Play button in the DrRacket IDE.

Using the program:

On running the program, interact with it using the left, right and spacebar keys.