Can't get state of the Next button to go from hidden to normal with 4 objects on slide

The first slide doesn't work either. It just looks like it does because when you click on the last character you have a trigger to change the next when user clicks on character 6.

Here are a few issues:

• When you use selected states, those are toggles. Thus a person can turn them on or off. You should use a visited state.
• The way your triggers are set, the next button won't change because you're doing it based on the timeline of the slide starting. Thus it will only work if the slide starts and those objects are in selected states.
• If you use visited states, you can create a trigger to change the state of the next button when the states of ALL ____ are visited.