This code is the starting point of a coding Dojo held by the Lambda Rennes functional programming meetup. The goal is to implement a clone of all-time video game classic: SPACE INVADERS !

We use the Haskell programming language, which embraces pure functional programming. We rely on the Gloss library, which exposes an Elm-ish API for writing interactive applications using 2D graphics.

As it is, the code compiles and displays:

• The spaceship.
• A monster.
• A trippy background image.

The game is entirely static and does not respond to user input. Your are asked to fill in the blanks and implement the missing features.

Current status: the rendering function displays a single monster at a fixed position, irrelevant of the game state. The same holds for the spaceship.

Intended status: monsters and spaceships are rendered based on the state of the game (Game).

The player should be able to move the spaceship with left and right arrow keys. The spaceship should not be allowed to move past window boundaries.

Allow the user to send missiles by hitting spacebar. Make sure to remove missiles out of the drawing area !

When a missile hits a monster, both should be destroyed.

Keep track of and render the player's score. Each monster should give 10 points.

Monsters should move downwards, row-by-row, every few seconds.

A collision between the spaceship and a monster should end the game

The project is composed of:

• A library, which contains all of the type definitions and application logic. Its code is found in src/.
• An executable that performs all the necessary plumbing for starting up the game. Its code is found in app/.

The interesting part of the code, where most of your work will take place, is found in the SpaceInvaders module of the library (src/SpaceInvaders.hs)

To compile your code, type:

stack build

To run the program, type:

stack exec space-invaders

Have fun !!