I thought this was a clever idea. I am planning on teaching sudoku to some young people.
This game is so aesthetically pleasing, challenging, and relaxing. There are a couple of errors/misprints scattered throughout the guide, such as my puzzle 24 and 25 being the same.
Also some of the colors are a little too close in hue, specifically the blue/green and red/orange combos.
Overall, though, this is a lovely game and a great gift to give or receive.
I'll be honest, I bought this game because it had "balls" in the name. I'm planning to put it in out at work so people can play with a few balls when they need a little break. I love the idea and think it's well executed, but would suggest a few small changes. The easiest improvement would be to include a second foam piece with holes that had the grid printed on it, if possible. I'm going to use a marker and draw it on the existing foam. I don't like how easily the balls move around (?!) on the current grid. The other suggestion may be more difficult, but it would be so much better if the balls had a flat side. Not a lot, just enough that if you drop one it won't roll under the furniture.
I absolutely love this game! But like the other reviewer, I noticed the mistake in puzzle 8. The green and light blue are a bit close in color for me (I added dots to the light blue lol). I'm still absolutely addicted to this game - what did I do with my nights before??!! Love love love.