Decker is fairly "powerpoint-like" in the sense that it's organized around a set of "cards" that can be drawn on. It's designed to allow users to create simple interactive projects without any programming, but there's also a powerful scripting language available for more sophisticated projects.

http://beyondloom.com/decker/

Some examples of how people are using Decker:

https://itch.io/games/tag-decker