There's a lot to like about this game. The aesthetic is fantastic, and the concept is very cleanly executed. The core bridging mechanic is also excellent! A small suggestion I would make, though, is to just remove the "two modes" and replace them with unique controls, i.e. chop on LMB and bridge on RMB. All of my other feedback is already echoed in the comments, but I did enjoy my time with your game!