I have done with my game project and it work perfectly when i try on Gdevelop.
Then i try to export the game, however when i export the game (for android) and build the apk, then i run the apk file but many picture/asset not showing up on the game.
I have tried to export manually as Cordova project aswell and build the apk, but i get the same issue
how to fix that issue? Thank you 
Make sure in Resources Settings you remove all unused assets, once this is done go one by one for those sprites that doesn’t show in Devices and check its animations
Thanks i will try it. But what is the “Always loaded in memory” in resource use for? what will happen if i checklist it??
I was also having the same problem and I wasted my two days on it. Later on it was found that the image which i was using was of very high quality and mobile was not able to display it properly. So, try reducing the size of the picture and then try once again, I hope your problem will be resolved.
