I love the premise for this game and could definitely see it being developed into a great little puzzle game with the introduction of a few additional mechanics.
To make this more interactive with the VR player I would recommend slowing the water down and allowing the player to grab and rotate the tower.
Some music would also be a great way to immediately boost it's impact. Despite the tension of rising water I felt quite relaxed playing this game, probably because of all the open water. A nice up beat chill out tune would really lift it.
And maybe a victory sound and some particle effect for the rocket launch.
Good job!