Really well executed, I love the decision to have pentagonal tiles rather than square, adding a bit of an advantage to the little guy and making it a very planned and calculative game.
The switch from the top down 2D game to being first person in the shoes of the fella you were just terrorizing was a really neat artistic touch, turning what as an interesting, yet harmless little game about trapping a blue tile with red ones, into a much more thought inducing experience with the very physical threat and almost visceral fear of being crushed by those very red tiles you were mindlessly placing moments before.
Gameplay wise, I was definitely a fan of the first section more than the second, but I think the presence of the second half greatly enhanced the weight, and feel of the first so I can't fault it at all.
This is artistically brilliant, I really love what you've done, great work!