So, any measure that aims at keeping users engaged (as the duolingo icon for example) should be viewed cautiosly.
Also, specifically with apps with which people provide real data, the more they see it as a game, the more the system will be gamed. When users start to guess, without really confirming it on-site, this leads to outright incorrect data.
What's fine, in my book, is to make the experience more gratifying, more "fun". That's probably what you meant, with firework animation etc.. The progress bars however already fall somewhat in the former category.
By the way, edits are accepted immediately. There is no verification step by the community (just like in wikipedia), all the more important it is that people don't start seeing it as a game first and as a way to contribute to a libre map second.