This is a guide of the level 1 IL speedrun so you can apply to real speedruns.

To setup the platform, you need to start running when the platform is starting to move to the left. This is so you can get a lot of speed.

After that, jump in the moving vertical platform around the third hole and the middle to get to the 2nd stair without bumping.

Then jump around the edge of the pipe to reach the other platform and instantly jump after touching it.

Continue the level and drop to the platform to get some speed, jump to the bricks, then to the pipe and jump late but not too late so you don't fall into the pit and then jump over the last pipe to finish the level.

I hope this helped you get better and more consistent at level 1!