I like the minimalist and relaxing atmosphere of your game.
The goal of the game is a bit unclear at the first level though, perhaps a tutorial of some kind would help. The timer seems a bit unnecessary (especially if you want to keep it relaxing, don’t add stress mechanics!) and being able to run the same path twice but backwards as a solution seems unnecessary as well.
Path laying puzzle games often have a hard time making good puzzles I feel, perhaps looking for a mechanic that changes the way you think about laying paths would help.
I like the music and the ability to quickly lay paths and undo them with a simple mouse drag.
Nice job!
If you have the time, please check out our game as well!