I like the idea.
I believe you can go somewhere with this. I would suggest using more sound effects, though. Maybe some music, or at least the option of music. I liked how the bags changed in value each time though, I give you points for that. The graphics were pretty good as well. I just didn't like the overall presentation. Maybe you should show a scene of the bag opening and the number showing.
Graphics: 7/10
Gameplay: 9/10
Audio: 4/10
Overall: 7/10
Just work on all of this in your next game... It might get an award. I liked your scripting.