Clock different times in diferent smartphones

Hi, i have a problem.
Im creating an educational game using animated sprites, but wen i run the app in different smartphones (motorola, huawei, LG) the sprites have differents times, then, the sprites reach the side of the screen in different moment, I need that the app do in the self form in any smartphone. Please help me. thanks

Please show your relevant blocks, particularly showing how you are setting "times" for your sprites

...that's because the App Inventor Clock Timer has a low system priority. There is an extension by Anke that provides a true timer.

I'm still working on it, but I don't have much time at the moment.

Here is the latest test version (APK):