It would be nice to see:

How many questions there are in total. For e.g., question 1/25 leads to 2/25, etc.

How many were answered correctly. (There are a couple that I'm not sure if I got wrong or was lucky in guessing.)

How one's score compares to the baseline average. (Not to other players, because other players could be re-taking the test many times or cheating. Take 25 random people, have them play the game once with no training or coaching, and use that as the baseline.)

Thanks for the feedback! Since the game is still in the early version, my initial idea was to keep it simple, to see if people will play it at all, but I’m definitely planning to add features like showing the total number of questions/statistics. Appreciate you playing!

What would be really cool, is knowing what was supposed to be different.

That is, how was it different? I got all but 1, and it'd be neat to know what primary colour was different. Then you'd know what your eyes have issue with.

Even neater would be a further series of tests on that weakness.

(Some people, mostly some women, have an expressed gene where they can detect 4 primaries. Wonder how that works here...)

Just played again. A nice touch would be the ability to play with the confetti as it falls. Just a thought.