Nice little game!

I like parkour games, this one looks good, with a nice mechanic, however, I think the character is ways too frustrating to control, it feels so heavy with too smooth movements, more air control would be welcome. I often feel like I don't quite control my character. Also sometimes the character stops the wall run for no reason I don't quite understand how that works.
I would also say the transition between the worlds needs a little visual and sound effect, it's very rough like this even if the second world looks nice in itself.

Also, why use two mouse buttons? You could map the swap to the left click because currently it's very frustrating to remember to hit the right mouse button to come back to the main world, I often click the wrong one, having just one button would be far easier.
Also, it's a little annoying how the music restarts after you die, I'm pretty sure it's easy to prevent this.

I did 201.08
With a few tweaks, this could easily be a good game!

Thanks for the feedback I did have it allocated to one mouse button at first but it would never let me swap back words or would only do it sometimes so I just left it as one button. Also yeah I am gonna like you suggested add a sound effect when Swapping worlds. I will try and make some adjustments to make the player feel a lot better to control.

Thanks for playing!