Glad you liked the game !
In the mobile version of the game, the ball is actually locked so it doesn't fall.
But i didn't include it in the desktop or web build because i thought it would make the game a bit easier.
On thing i can do is add different Difficulty modes as -
Easy: Balls would be locked in this mode.
Hard: Balls would be free in this mode.
Let me know what you thank.
Thanks for the feedback !