Okay, at first I was stuck on the first jump over the spikes. IDK while, the bar is just far enough and the ceiling low enough that regular jumps won't work. For some reason I forgot I can double jump and it wasn't until I read in the comments that there's some coyote time that I was able to get over that but that's the second checkpoint in the first level. lol I would tweak the design a bit to help build up to those types of jump since I was still getting used to the controls.
Overall, very tight controls, and solid classic gameplay.