There is one invisible square on the map
You must find it by moving the mouse on the canvas
When you hover i, the pointer become green and the opacity start to increase
Click on it to validate the point
You must avoid the moving ball
Each new point increase speed and size of the ball but decrease size of the cursor
Feedback from the judges
Tomasz Wesołowski: Interesting! The best technique seems to be to randomly flail the cursor around the screen until it blinks green, then look closer, the square eventually appears on its own at random so it gets quite easy. I could use a little more variety, something that would make me be more careful with the cursor, like stationary walls that I should avoid .
Jupiter Hadley: Really nice mechanic - fading in the square like that. Simple game, but nice.