Bleenx Well they still do, but it's a matter of keeping it to a minimum. Notice how the foreground particles are spread from each other to cover as much space as possible with as little overlap as possible. The small dust like particles are accomplished with setting large X and Y randomiser values.
I see what you mean now. I was thinking "how in the world did he keep particles from overlapping??" Well, good to know. You said you kept things mostly to behaviors also. So I'm sure you relied on the sine behavior a lot for moving things rather than creating events? Also, you said "no sprites changing frames." What exactly do you mean by that? Sorry for the all the questions. You've just piqued my interest in trying another 2d game again in Construct after finishing this project I have in Unity.
Also, when you do plan the mobile launch?