How to submit dial interaction

I have used a dial to create a simple game. When the dial is moved to the right location, I am displaying the correct layer. I used "convert to freeform" to get the layers but i am not using any of the free form choices provided.

However, that means that although the user sees correct and incorrect layers, the interaction is never submitted and the results are not displayed.

 

How can the dial be used similar to other interactions and a score be calculated ?

 

View attached file and suggest the approach.

 

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