I'm no "master aquascaper", but a few remarks from my personal taste:
- The stone all the way to the left and right is a bit too close to the glass. Try to leave some space for the aquascape to end seamlessly.
- The line of stones in front of the driftwood is a bit to even and straight. The aquascape would benefit from a bit more depth and surprise.
- Your aim that you describe is clear and creative. Right now the driftwood comes across as trapped by the stones. Have you considered letting part of the driftwood break through somewhere along the stone wall? Maybe having moved some stones out of the way to visualize the impact of the breakthrough. You can angle the driftwood a little towards the front glass to create depth, allow for breakthrough and give space for somf background plants behind it.
Overall I think you are on to something good here and I wish you all the best! It will be interesting to follow your aquascape. Keep us posted!