This isn't bad actually.
It's obvious you're still learning and the platforming controls are questionable at best, but the level design is pretty engaging and creative, so it's pretty fun anyway.
My tip to you: the next time you make a platformer, don't use Unities physics stuff (Rigid Bodies etc.). Do the physics yourself. That might sound like it's harder, but it's really not. And in the end you'll know exactly what does what and how fast the player runs, how high the player jumps etc. and you won't have to deal with wonky momentum carrying the player so fast that the next platform is barely on screen anymore.