When examining Geany's binary file I stumbled upon some strange ASCII content that looks like part of a game (see screenshot). A game in Geany?
It's an easter egg that is supposed to start when opening the "About" dialog and - as far as I understand - clicking the Geany icon.
Here a bug report that contains an attached screenshot of version 0.18
I found another Japanese page with screenshot of version 0.19, where the images used for the game are corrected.
These are old Geany versions, but binaries still contain the game description, so they may as well contain the game.
Did anybody crack the egg?