How well do you know human heart?

Objects guessed correctly on the first try are filled with green. On the second try, with yellow. On the third try, with orange.

After three tries the correct answer is revealed and filled with purple, then with red on hit.

Choosing any found object again does not count as a mistake, and shows its name instead.

The “I am tired” button finishes the test ahead of time and shows the result.

Don’t forget to check out settings, there’s some interesting stuff in there.

And, yeah, we use cookies, where would we be without them?