Hi! I tried the game (under Windows + Chrome).
On my first run, I wasn't sure what I was supposed to do, I initially thought the goal was simply to keep as many balls as possible inside the circle.
After playing through the tutorial, I gave it another try. The tutorial is well designed: it's short, interactive, and explains the gameplay clearly.
At the moment, though, I find the game a bit repetitive because there isn't much to do yet. I'm curious to see how it evolves as more mechanics and content are added.