Lively Snake Demo

This is a demo of live coding snake game in ClojureScript using lively. It was part of a talk I gave in clojuTre 2014.

Setup

Clone this repository and cd into it:

git clone https://github.com/immoh/lively-snake-demo.git
cd lively-snake-demo

In a terminal window, start lein-cljsbuid:
```
lein cljsbuild auto
```
In another terminal window, start Ring server:
```
lein ring server
```
This should automatically open a web browser, if not, navigate to http://localhost:3000/index.html. Optionally, open JavaScript console to see when the reloads happen.

Demo Steps

Demo steps can be replayed by checkout out git tags in specific order. In order to do this, open (yet) another terminal and cd into lively-snake-demo dir.

Change start screen text
```
git checkout 1-change-start-screen-text
```
Title in the start screen changes from "Snake" to "Lively Snake".

Click on the "Start Game" link. The snake appears but it doesn't move.
Make snake move
```
git checkout 2-make-snake-move
```
Snake starts moving to the left, and goes of the screen.
Make snake stay on the game area
```
git checkout 3-stay-on-game-area
```
Snake comes back to the game piece by piece, and doesn't run out of the game area anymore.
Enable snake controls
```
git checkout 4-enable-snake-controls
```
You are now able to change the direction of the snake by pressing arrow keys on the keyboard.
Add an apple
```
git checkout 5-add-apple
```
An apple appears on the game area but it is a difficult to catch since it moves constantly.
Make apple stay in its position
```
git checkout 6-make-apple-stay
```
The apple stops moving but the snake runs through it instead of eating it.
Make the snake eat apples
```
git checkout 7-eat-apples
```
You are now able to eat apples with the snake. When the snake runs into an apple, the apple disappears and snake grows.
Implement game over
```
git checkout 8-add-game-over
```
If you now make the snake cross itself, the game ends and start screen with "Game Over" text is shown.