A great start! Congrats!
Good progress.
Great use of the behavior.
I was able to walk directly back off of the map and pass the letterbox and fall off, so make sure you have a definite kill zone and if possible bound the player to the layer.
All in all, looking forward to the finished project.
I hat some issues with the rotating player where it would get stuck and it wou7ld take me a while to get unstuck.
Aside from that, a solid game and can't wait to see the finished product.