If stinky stands on a square button, and loof moves over a timed or circular button, the square button will not be effective, and the gate will close after loof steps of the circular button, or the timed button expires

Two-way conveyor belts, have there direction reversed after something touches them, this is also the case if the conveyor belt has been stopped by the respective button, you will need to remember this to complete the level.
This one has a couple of ways of finishing, some items may not be needed.