He modified the height of the tunnel by trial and error to get as low as possible while still being able to manipulate the torches. Luckily, the last one was about three meters high. Ikky jumped with all the momentum he could and managed to go down the slope as much as possible for the last part of the tunnel.
He didn't have time to prepare himself, the unpleasant clack-clack sound rang out in front of Ikky... he had never seen these monsters, they were a kind of bipedal crab 1.5 meters tall, with two large pincers instead of arms, four legs, and covered by a chitinous shell, they had no head, only a mouth at the end of the torso, two eyes on two protruding stalks.
In a happy world the monsters would not have had hostile intentions, but that seemed like it wouldn't happen in this tutorial. Ikky could count more than 20 of them.