You could try to go on the red button to activate it, press enter to de-activate it, then go off the button and back on it to repeat the process. Do that a bunch of times, to increase the time between resets faster than by trying the riddle each time. The increase is little, so you need quite a few resets before there is a big difference.
When you get to the blue button, go back down immediately. If you go to the chest or try to go out of the room towards the north, you have to re-do the previous steps again.
EDIT: Going out of the dungeon and back into it resets the timer, and therefore all increase to it. You have to stay in the dungeon to keep the increased time.
I didn't add an option for the riddle key in this dungeon, as it seemed like a waste of one of those cheat items to skip the riddle, since it's not a matter of figuring out a riddle, but that you just have to find the right route and move through it quickly. But I might underestimate how hard it is for people that insist on playing with a touchpad, so I consider to add that option in a future update.