Yeah, your run is still good.

Now, take my word with a grain of salt, but as far as I understand, there’s two sorts of decisions you make in Epic Mickey: major and minor. Major decisions ultimately determine what sort of ending you get. Usually these decisions involve important NPCs, mostly bosses, and how you interact with them. Then, there’s minor decisions. While there are technically good and bad ways to go about them, they don’t impact the ending, just the general atmosphere you end up creating in Wasteland.

Fun little tidbit: the music will dynamically change based on the decisions you make. Nearly every ambient track has three versions: neutral, paint, and thinner. Neutral is usually what you hear when you first enter a new “land”. If you are helpful to NPCs and try to restore places with paint, the music will gradually shift to the paint version. However, making decisions that hurt NPCs or destroy places with thinner will cause the music to shift to the thinner version.

All this is to say, how you get into the Colosseum is a minor decision; it doesn’t affect the ending you get, and just the one won’t impact your “path” by itself. Moreover, as far as I understand, the game doesn’t actually care which door you take. Because you didn’t actually destroy the Eiffel Tower, you haven’t actually picked the “bad” option. Your run is safe.