This is a nice take on the build a path mechanic. Definitely a bit heavy on the rng, but I could see a few ways to mitigate that through the shop like being able to buy more sideboard slots or additional redraws per level.
It seems like the start and end points are always the same. I think starting and ending at different positions - at least across the top and bottom rows, respectively - could have spiced it up a little more.
Great job