MatheAss 9.0 − Easter Egg

Who will find the Easter egg in MatheAss?

It's a little game to relax in between.
Anyone who finds it can purchase a license from MatheAss for €10 instead of €29. Simply send a screenshot of the solution via email and then select the "Update private license" option on the registration  page.
The offer is valid until: April 30, 2024

Please send the email with the solution to

PS: To find the Easter egg, you have to click in the right place with both mouse buttons.