Jewels Collapse was my first Creator game test. It took me around 100h to build, integrate SDK and publish on iOS/Android. The actual game development was around 60h, but I had to learn a lot about Creator. Game mechanics are quite simple, same as UI. An experienced Creator developer should be able to build it again in 1-2 days. Most of the work came from integrating SDK (my first try with SDK Box) and Game Center/Chartboost integration. I had issues integrating Google Play leaderboards and still do not work on Android. But as I said, its a test project. It still has some bugs.
Already working on my next game