What phone to be used

[Mohamed_Tamer]

The device you choose in the designer is only a way to view but that won’t affect your app ( may be i’m wrong ) ..Also see here ( regarding the problem with canvas ):

Responsive screen vs. image sprite / ball

It can be that way, yes. But unfortunately it’s not. The preview you have in the designer only works in pixels while the way you are proposing is a proportional or relative positioning. I’ve done a lot of apps that places stuff at Screen1 initialization and it doesn’t take a lot of time really. Just make those calculations you posted in your last comment to be able to place the balls in the right spot. Just remember to use the canvas width and height values instead of the Screen1 width and heig…