Amazing mechanics! The first 11 levels were really good and I loved how you introduced all the nuances of the mechanics with seemingly impossible setups.
The other two mechanics introduced were also really neat and it feels like there's a huge possibility space to explore! I'm guessing due to jam constraints the level design there was rushed though; I managed to solve level 13 without using the new mechanic at all, by making a horizontal 2x1 block and pushing the vertical 2x1 block over.
Hopefully you expand on the second half of the game since the consequences of the mechanics are so cool :D