For the first mawlurk the key is putting yourself against the wall and dashing, then just go as fast as possible and make sure to jump over the mawlurk, one of the infection projectiles might go towards you, after passing it, you can tank the dmg and continue or you can delay the dash or stop entirely until youre safe, its good to mention as well that a lot of the times it lands right next to you and doesnt actually hit you, the projectile hitting doesnt happen too often.
On the way down you can do a little ceiling boost, but make sure to not land on the most right zone.
For the second mawlurk i recommend jumping where the shell next to the wall ends and dash slightly above the groung to avoid corner correction. From there, keep dashing and pray to not get hit.
As for the 3rd mawlurk, you should dash just as you pass the little mark on the ground next to the grass, and you can stop holding left for a moment if you want to be safe, again, there is a chance that a prejectile hits you after clearing the zone where the mawlurk shoots, but its very difficult to rect to and its rare enough.
For th 4th one I try to dash as i land on the slightly below level, but I havent found a good enough set up, the most important thing is to not fall into the spikes.
After clearing it, you are going to want to stand to the right of the hole, dash left, jump, land on the higher ledge, dash pogo and dash quickly, and either wj and wj 3 more times on the left wall or land, jump and wj 3 times, hold right after that last wj for a bit and pogo the enemy thats directly above you.
Continue to the last mawlurk, dash on the middle of the high part, dash again as soon as possible, jump, dash again as soon as possible, as you land jump, stop holding any directions, pogo and dash over it.