Hey guys :)
Thank you for your comments :) Please excuse me if I make some "english mistakes" it's not my first language. I will try to do my best.
So, Sully you are right, we can improve it. I will share the capx on the afternoon (France Time lol), and I will update the topic with some explainations.
But you will see that it's not difficult, there is a very simple code. The aim is to create a fake z coordinate with some mathematic calculation :) On the other side, there are always 250 stars (sprites) on the screen so for example on my Eeepc that's not smooth (because I have a small graphic card and no webgl :( ).
Thank you and I'm happy if you enjoy it. I posted my sample in the Scirra Arcade and it was been approved so I updated the link at the top of this topic with the Scirra Arcade link.
Ouf...I hope you will understand all I wrote here lol ^^