PIece in G dur

I need feedback about how should i continue.

Piece in G dur.pdf

Hi Martynas.
There are countless ways to continue that, even only using the material you have already engraved. Among the simplest of options you would have: transforming it by augmentation, retrogradation, diminuition, transposition, sequencing, and a large etc.

Of course, you can go further and further on.

Now, roughly speaking you go from I to V to I in a quite straightforward way. Next section could begin in V and go back to I, or from V to V, or somewhere else, etc etc.
And that's only the surface of the surface of what you can do.
Therefore, the important thing here is that you experiment, imho.

Since you only asked for feedback on how to continue and not of the excerpt itself I'm abstaining of giving anything but the bare minimum here so you go your own path, of course.

Here's a simple semi-improvised example. The PDF explains briefly what I did with some of the material.

Best wishes!
Example for Martynas'.pdf