It has been by far too long but let's hop back into it.
1-2 is a very tight timing level for weaponless% if you want to get great times and for normal times not a level that is a huge bother.
The first trick is to perform a very special dive at the start of the level. When you fall from the pipe walk forward untill you just about decent the first little step where you land from. Then do a dash jump forwards. This should result in you exiting the door at such a speed and position so that if you time it correctly, you can get a slam store off the edge of the door as it opens. This timing takes some practice but with the set up shouldn't be too horrid.
Following this, once you have the slam store keep holding forward untill you land on the small flowerbed. Once you land perform a dive and you should be angled just right to move forward and up through the center structure without stopping untill you reach the top exit.
Backup strats for those who struggle with this are to exit the start as normal and use a column nearby to slam store Instead.
Once you reach the filth room, spawn the enemies and move to the center, jumping up to bunch the filth and using a kb to kill. Then when the drones spawn you can attempt to punch one drone into another or punch the drones into the schisms that group up. Any remaining schisms can be killed by whipping them up and splitting them to the ground. However one trick you could attempt is using a kb explosion to backfire their shots as they spray them at you.
Once that area is done, dash slide jump into the next room and whip to grab the blue skull. Once grabbed, checkpoint reset and dsj to place blue skull in the first area and grab red. Then once red grabbed, checkpoint and dash back and slam to place red and continue to the last area.
Run to the end of the room to trigger the spawn of 2 streetcleaners. Punch one with kb then jump. The other will walk to stop beneath you so slam and punch them before jumping again to then slam the first one and kill. 2 more will spawn and can be taken out the same way but be wary of the drones and try kb them into eachother if possible. Then to finish move I to the upper half of the room to spawn the strays and use a slam store to use the blender tech with the whip and take out them all. Land and then dsj into the exit :)















