Hi, I have followed first tutorial, to show a sprite. Sprite is showing in editor. But when game run, no sprite at all, just black blank screen.

*Using OSX Yosemite.

It sounds like you might need to load the scene if you haven't already. Creating a script with the code below should fix it, just be sure to replace "Main Scene" with the name of the scene you have your actor in.

Sup.loadScene("Main Scene");

You can also set the startup scene in the settings, which can be found at the bottom of the asset tree. More information on scenes here: Link

Hope this helps!