I had quite fun playing this, though I cannot say I learnt much about the strategy of how I should place my stuff. But I also didn’t feel like it was the main focus, that its core rather was have things just go a bit wild and hopefully the ball bounces to where it needs to go. With that in mind it is a pity the UX was a bit cumbersome in needing to select eraser to remove and then bug to place again. Rather than having something like left/right click. Also I would have liked to play more with more of the critters, not just the beetles. I think it was only the last level that you let us place different stuff.
Play-through with more feedback: