The game would display a message when the user presses reset, but this screen is never visible under normal circumstances.
The end of the reset code (starting from $7968) writes $56 to $FF06/$FF07, which is an "invalid" combination. This turns on ECM mode and multicolor mode at the same time, which is not possible. In this case the TED will generate a blank, black screen.
Otherwise, the screen would look something like this:
Godzilla reset screen
The message translates to: "Do you know what this is? This is reset protection. Greetings: Alex."
