See glass

Turns out you can do callbacks with Cocos2d. Nice job hiding one of your most powerful features! Maybe they felt it was:

1. Too difficult for new programmers
2. Error prone, even for experienced programmers
3. Just didn't really feel like documenting things that day

Today my main competitor set their price on the App Store to free! Thanks guys!

I really think devs are 100% shooting themselves in the foot by setting their price to free in an effort to gain popularity and convert that to sales. You can look at it as extremely low conversion rate advertising.