You can definitely do it on keyboard but i agree that it's WAY too hard. If those small jumps are supposed to be a core mechanic of the game then the time window to get them should be much larger.I had bad memories about the platforming sections of the first demo, and here we managed to make that situation worse. From the keyboard, the worm part is simply unplayable, or at least I haven't found a way to prevent the character from splashing against the roof straight into the worm wall at the slightest press of the key. I tried the mid-air dodge, but if not done while gliding it raises the character further accelerating the collision with the roof. It doesn't help that the worms have a larger hitbox than the visible one, which sucks up the character as soon as it comes in contact with it.
By the way, can you guys tell me is there some more story after you rescue the girl from the boss? I was wondering if i missed some obvious trigger or something because there is no objective on the map and i'm just exploring for now.