Ohhoho a fellow enjoyer of loopholes! How great to see! Really love all the different ways one can go about this!
For my game I also thought about doing it more free-form but could not get it working. How did you determine what was used to get the pie each iteration? The last thing touched in x seconds or so? Just saw it in another comment that is such a clever and clean solution even if it does not work 100% of the time as the player would expect it still works well enough too fool you!
The sound overall was great but the droning of the lawnmower did detract a little bit from it. I wished I could have turned the damn thing off :D
I also feel like the transitions could have been a little bit quicker or a way to skip them altogether since when there are a lot of rules one quickly runs into something forbidden and has to wait quite a few seconds.
I loved that I could interact with the world in so many different ways when I struck down the power-line or the trees with the ax I felt so smart :D