Is it for a training tool?
I played 22 hands, 9 win's, 9 losses, 3 pushes, 1 BJ.
Three of my wins were DD.
For free no one can or should complain to much, but here are a few questions and comments I have.
Colors could be changed and I wouldn't complain.
A few times the players only had one card show up, (but the total was there).
Do you have a surrender option?
What about split? I didn't notice one. If so can you DD after a split?
How many decks do you use? Can you change the number of decks?
Can the players change the house and player options?
Can you play multiple hands?