A few days ago, I crafted a Steam badge. In the resulting level-up, I was rewarded with a 90% off coupon for a game called Obulis. Checking the store page, I figured the game looked interesting enough, and because the coupon cut the total price down to a meager €0.50, I saw no pain in buying it, especially with all the other games I bought and have yet to even touch. It's a purchase I do not regret.
If you like puzzles, there's no reason why you shouldn't pass this game up. Even at its full price, it's fairly reasonable. Perhaps my only big gripes with this game are the occasionally obstructive foregrounds (such as in the Windmill area in Chapter 1) and the over-reliance on perfect timing rather than logic. Far too many times did I have to reset the level because I cut the chain/rope/pole a split-second too early or too late, making the marble in question completely miss its mark. This is especially bad in levels that require a lot of steps to complete. It's frustrating in that you can't solve the level despite knowing the solution.
But aside from that, everything else about the game is highly addicting and I strongly recommend that you try it if you're a fan of puzzle games. Just keep one thing in mind if you're a completionist: If you can't solve a level, DO NOT LET THE GAME SHOW YOU THE SOLUTION. Otherwise you'll forever forfeit the stars you would have obtained from clearing it. I learned this the hard way.