Yup, I know. Long story short I'm able to update the app datas remotely, but not the images Haha. Stupid right ?
Anyway the asset is on the next version which is being reviewed by Apple right now.

Funny thing is that you also have the lost vikings on your app. I just chose to hide them because no images...
I will display them a day before the update. Hope I won't get crushed by the users ratings ^^

Thanks for the feedback though.