I'd say it "ruins" the game as it's definitely annoying and as a player, you know it shouldn't be there. Especially on what one would expect out of a professional/commercial release.
How bad is the brief screen jump and flash on the real hardware? Does it break playability?
thank you for the details! I agree 100% that it needs to be playable on the real hardware and I am tuning Breakanoid now to resolve these issues. I am also implementing your idea to make the magnetic paddle an option - not sure if it would be better to have it difficulty switch selected or make it one of the special power ups you can catch