[QoL] Screen provides no visual response to indicate a connection

[Fallenleader]

While the application itself works flawlessly, the lack of any indication it is connected left me confused for a moment.
Would be a nice QoL improvement to have a brief, 30 second display to indicate that a connection is established.

[Extrems]

The GBA goes to sleep after 5 seconds with no bus activity. That should be a strong enough indication that something is wrong, whatever it was in your case.