Hi! I'm Aidan Boreham and I found this post by searching for my name in Google.
Thinker was written a long time ago when I had time on my hands. I'm still a programmer, but not for games
When you finish the last Expert level of Thinker 1, you are asked to email me telling me of your accomplishment. Unfortunately I don't have that email address anymore, but I do remember getting the occasional email from people who took their time to finish it!
I started writing Thinker 2 using the Thinker 1 engine but added different features. The engine was complete but the levels (which take the most time to make!) weren't (only Beginner and Intermediate). I remember being asked for the level editor, but I don't have that anymore (lost after so many harddrive reformats) and I can't remember if I actually gave it to someone.