I checked and managames.com version is working correctly, but not the App Store. It seems to be an unsolvable problem, as using the recent image library brings bugs on El Capitan, but using an older one make the color change invisible...
Anyway, here what you can do :
- right-click on your "Tennis Elbow Manager.app", then go to -> Show Package Contents -> Contents -> Frameworks
- there, delete SDL_image.framework
- download SDL_image-1.2.12.dmg from here : https://www.libsdl.org/projects/SDL_ima ... e-1.2.html
- unpack it and get its SDL_image.framework and copy it in the Frameworks folder of TEM App
- launch the game, it should work correctly