Random generating levels

Now I want to make a very simple game in which a player simply has a horizontal velocity to right(Make the level go left) and we have to press space to make him move up.

This is really easy.

The difficult part is, I want to randomly generate obstacles in a correct pattern.

My idea is to make may layouts and randomly and scroll them randomly.Is this possible?

Or is there any other way?I have seen many games like this so there has to be someway.

You should look at the tutorials and forum topics on endless runners, generating terrain with arrays, etc... most of this should be covered there.

Yeah, the infinite runner tutorial that is available in Construct 2 will get you started.