The pixel art and chiptune music fit well with the game, it brings a lot of arcade vibes to it.
I think it’s interesting to explore Pac-Man mechanics in another context where movement is less rigid with more options, but I feel some of those restrainments should also be applied to the enemies. Giving them the ability to pass through walls was a little bit too much IMO :P.
The different cost damage in the obstacles is a nice design choice, I think you used it well to punish easier paths, but not so much when adding the cheaper ones.