I've only got a couple of suggestions/Feedback at this time.
1. You should give a black outline on all the letters that are white, as it can be rather difficult to read them depending on the background image.
2.Maybe add a finished button, that when clicked would have the character acknowledges that your done, and could give different lines of dialogue and/or images base on whether you clicked during a red or green light, then give you the option to return to the character selection screen or exit.
3.It's not much of a suggestion, but the ability to input a name that she could use during dialogue.