Black screen error when i pass from screen 1 to screen 2

hi guys.
i have an error with my first app,all its working fine but when i press a button to pass to another screen the other screen doesn't show me anything of my progress.Can you help me?

Probably. At the moment we can only you stop any clock timers before trying to switch screens?

It may be easiet to upload your aia project for someone to take a look:

(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.

look the blocks

parcial_copiar.aia (5.6 MB)

You have an error

You demon images are not named correctly in the media folder - e.g. demon1.png.png

apart from that it seems to run OK

I changed it but still the same

From your video, it looks like you are using iOS. There is a known bug in the version in the App Store that breaks the screen switching when values are used. The beta version in TestFlight should fix this issue.

TestFlight is on the app store?

Now its working!!! but i have this error now
Sound not ready to play.