any plans?

I know which room to get it in, but no matter how much I press the button, the achievement doesn't appear. I've already tried with the macro and nothing happens. I believe it is due to the lag. If anyone has any idea what to do, tell me, it's my latest achievement. (Yes, I already reduced the window size)....

Thought I'd share the game map I made as I was hunting for secrets. Updated, now shows nearly the entire map (save some blank screens here and there): all unique named screens, including: all Abandaoned Cores all Heart Containers Gauss Gun powerup Links: Low-res png (16366x2160, 10mb) Hi-res tiff (30784x4063, 30mb) File dimensions ...

I know I must be missing something obvious.

Just wondering.