Mostly at "higher" speeds (4) it becomes noticeable that the game will try to push you through a block with a 1 tile height (also 2 btw) falling on you instead of letting the block kill you. Same happens generally that it will push you out of the way/not kill you when you have 1 pixel to stand on or on horizontally moving blocks that generally keep you alive in almost all cases.
Becomes annoying when you have a level that tries to base gameplay around that :C