I got 2010 before mixing up two greens. I'm happy with that score!
I absolutely love the atmosphere with the music and parallax background. Having everything be greyscale except for the important key and lock colors was a great choice. I think the only detail in the atmosphere that wasn't perfect is that the jump sound didn't quite fit the rest of the mood, but that's just my opinion.
I enjoyed how things sped up and colors got added. One option to make it more colorblind friendly might be to change up the graphics slightly for the different color locks. Something as simple as adding a dot/blemish that's in different places for each color lock would be enough, I think.
It feels very polished considering the amount of dev time. Always glad to see your games here :)