Sorry for the delay
I used your mixer and every thing went as it is supposed to be, though, I have few remarks:

- The customer should know what is the difference between using 0.3% or 1% or... fee
- I think you should expand the "expire time", you don't know what the customer may face and 1 day may not be sufficient.
- The "client code" should be more noticeable.
- Add a QR code for the address the customer is going to send BTC to.
- "min" should be less than 0.002 BTC and "max" should be higher than 0.08 BTC.

Wish you all the best with your project