Rocks'n'Diamonds

I played one time and went to a dead end with a switch. I wanted to open the door quickly for a speedrun (without tape), so right before the tip of the dead end, I pressed diagonally at the switch, then it keeps acting like I pressed the button in the way extremely fast with the keyboard, causing the doors to look like they are going haywire!

The switches for other things also do that, and the doors don't look like their going haywire, they look like the closing/opening animation (depends on what position the door is)repeating over and over and over, etc.

Just had a quick look at this -- this is clearly a bug! :-o