Neat concept.  I especially liked the ending.   Others have said the main issue so keep at it.

I duno if it's a bug or not but I couldn't switch after a certain point and then after the screen went black I could switch and the dialogue kept looping.

cool aesthetics !

Fun little platformer! I'd have liked to see more puzzle elements. Games with world-switching mechanics like this (like Giana Sisters: Twisted Dreams) can do a lot with puzzle elements alongside the platforming difficulty.

The biggest critique (which others have talked about) is the camera is too high relative to the player, and stays fixed on the player. 

I highly recommend reading this Gamasutra article on cameras in sidescrollers. Something like the platform-snapping camera-window used in Rayman would do wonders for the issues that your camera has.

Cool game guys! Reminds me of the mirror from Dishonored 2 and portal reloaded

Really awesome concept, i like the CRT effect in the old world, i like the sinister ending of never escaping, the music is decent and the pixelart is nice, great game.

Cool game solid concept, the areas where you have to jump on the bouncy things and switch to the retro version are near impossible lol, the constant crashing was a bit disappointing.

The use of going back and forth between time allows for some really fun platforming sections. One thing that made it a little unfair is the camera which made it hard to see what was next, but with enough trial and error I figured it out. I made it to the end, but I didnt really understand it. Anyway, I had a lot of fun playing, so good job!

That hair! haha, great pixel art and cool concept!

Clever game! Felt maybe just a hair too zoomed in for some of the sections, but not much you can do when the resolution is so small.

Nice Game having to switch from retro to not was a cool use of the theme

Yes! Love the idea. I was notified a bit late to press Q to switch between both screens. Really fun!

The gameplay is the right balance of difficulty and enjoyment. The cathodic TV mechanic reminds me a lot of Guacamelee which is a good thing!

Nice game! The art is cool and the mechanics are fun:)

Nice :D liked it