The graphics are quite smooth. The dialog scenes do a good job of setting the atmosphere.
I found the down-attack to be awkward to use, and yet it was the only way that I could find to hit the enemies without them hitting me back. So I ran past enemies without killing them, but there was eventually a spring that I had to launch myself off of to hit and land on a wall block with a couple of enemies attacking me, and I died trying to channel my resize while they hit me. The checkpoint was pretty far back in the level, so it was discouraging for me to try again.
It might also be good if there was some visual feedback when an obstacle was at the min or max size, and which direction it would grow.