I was impressed how smoothly this mechanic works out. Sometimes I worried a level would get tedious, but with the fast controls it was very satisfying to move the pair around.
I like the initial twist a lot, but the second variation on it seems pointless (due to symmetry), and also very weird story-wise. But I think there's a lot of potential here to tell a nice little story about 2 characters with these mechanics.
It was often hard to remember who is vertical and who is horizontal -- by the time I got it down, the game was nearly over.
I appreciate that the levels were fairly easy, in particular making it hard to get yourself stuck. The final puzzle was really great in this regard, and was super fun at the end. But initially the final level was overwhelming, especially since I had no idea how many more levels there were at the time -- I almost quit at that one.