I think there's an error in tiles.png in the full version. There are 2 diagonal path tiles at 64,560 and 96,592 that need to have their parts flipped around. I'd post an image to point them out but they're not in the free version.
Pretty fun! It's a little annoying to have to select the player every turn to move, but it is nice that the controls are all mouse so there's no controls to learn. It's great that you have a little tutorial for players as well.