Thanks for replaying! I'm happy you still enjoy it. Stuck In The Past is turning 5 this year and it still holds up for me.
The big log is a running gag throughout the game and there's no way to move it. I had the idea for a SITP sequel where you actually do find the Unga Bunga and get him to move the log out of the way, which would open up a passage through a forest and into another town. I don't think I'll ever make it unless I'm really in the mood though. The area with the house isn't accessible and is supposed to be a forced perspective look into the river valley. Personally I'm really happy with how that came out!