The jumping feels unresponsive, particularly near edges. I obviously can't say for sure, but judging by the ability to climb through corners and the generally slippery diagonals, my instincts are saying the edge physics are interfering with the ability to jump quickly.
The log doesn't respond if I click on it while it's near an edge of the screen.
The part with some rocks at the top of a hole doesn't seem to have a way past it.