Fun and engaging!

But Im only giving it 3 stars for two reasons--really confusing UI design, and overly specific object placing requirements. In two cases Id solved the puzzle but essentially had to try and nudge an object over to have it work properly (hard to do on iPhone). The first level is entirely intro stuff that is kinda boring and overly easy, once you get through that its more enjoyable because you have to use your brain a bit. That being said they arent super hard for puzzle-oriented people.

Pepperka about Crazy Machines, v1.4