In this post, I will point out some techniques or difficulties I had to deal with:

• Scrolling: I used a personalized CCScrollView with Parralax effect. Scroll view had to be resizable (to create 3 distinct areas: left/middle/right). It had to use bounce or not, swipe effect (with decreased speed) or not (for camera mode). Gesture recognition was a problem with children's small and imprecise finger: they need to scroll and touch animals. So i had to deal with the speed of gesture and speed of scroll (if the scroll is near stopping, touching an animal is treated).
  

It was our first IOS project: we had all to learn (objective-c, cocos2d, IOS sdk, device capacities, xcode…). We planned to do a simple game just to learn and test the AppStore.

But finally, we created a real game with a lot of graphical resources.

October 18 (week 42): I tell my web designer about my idea: he loves videogame, so no need to convince him, create a game (even for children) can only be fun! So we started to work on the concept and I tried to create a prototype with cocos2d during the first 2 weeks.

For each world, Jean-Yvon had to:

• Create the landscape (with 2 layers for parallax effect). He (re)discovered hand drawing/painting with a Wacom Bamboo tablet and he is talented! Each landscape is composed of three environments (like desert/savanna/jungle) for a total size of  9000*640 px (HD).

We have chosen Cocos2d framework to develop our game (and to learn objective-c !) because:

• A lot of games use it (so it is mature)
• The community is very active
• A lot of tutorials and books are available. 
• No need to learn openGL.
• It’s free and open source