It is a game not to be ejected from the blue area set in the center of the screen. The black balls that interfere with each other will accelerate and will accelerate, so let's do it better if you do well.
Access is from the following.
Method of operation. Use only the cursor keys, move the white ball so that it does not come out of the center area.
Click on the bottom right to switch the presence of the background. There is no default, but it is somewhat lonely so I tried it.
Eight black balls attacking. As the speed comes up, the distance to be flicked away also extends, so I want to avoid as much as possible.
When it gets out, it ends. Retrying back in area.