This is Jezzball, old windows game with a "Limiting Space" mechanic. image from wikipedia - Link

Played this one a lot as a child, and later when I got into game dev I sometimes wondered how hard it would be to implement something similar.

And now I know:

Turns out, pretty hard for me, took the complete 2 days on basically full coding mode.

Here is the link if you want to try it our: Canals