It's possible that you may be tired of answering the same question over and over but, how are things going? I can imagine that rewriting code and improving graphics take time so, how advanced is all of that? And finally, could you say a release date because I'll settle with a realistic estimation.
Things are going fine, we resolved a lot of issues and the game is working perfectly so far. Sometimes repeating a task give you a new perspective about stuff that didn't work well in the previous version (anyway it's a pain in the ass haha). Right now we are implementing the logic and core mechanics of the puzzles and still working on the AI. About the release of the game we can't confirm a certain date... We planned to have a Beta version for the end of the year, but time will tell.