Pretty nice game. It lacks some animation though. Also, why does the downloaded file say "Brackeys Game Jam - Rewind"? Was this made for that jam and reposted to this one..?

Good game, good color palette that matches up nicely and highlights the character position, clean character movement, clean camera transitions, the movement blocks are elegant and simple, good and simple sounds and a nice background music that doesnt dominate. I like that you have two variations of rewinding, one being restarting a level and the other being restarting the game.

Some minor critiques if you want them:

 Level 3 is likely one of the harder levels due to the falling platform jumps, if you do not jump before it starts falling you will not make the jump from block 2 to 3. Additionally if you touch the sides of the blocks then they will still fall. So long as you keep this in mind when making the jump then it is still easily feasible to make the jump and luckily simply dying isnt a rewind whereas running out of time is.  A good way to fix the falling block issues might be to check the player's y position versus the block's y position and to not trigger the fall unless player y < block y (or greater than, depending on game engine and orientation) or something like that; this would likely fix the block falling when touched from the side issue. As far as the block jump itself like the one on stage 3, theres several approaches and honestly fixing side-on collision might be enough.

Also I dont know if it can happen, but the timer continuing to tick down after touching the portal does introduce some anxiety, I tested it a few times and while I could get the 'rewinding due to time running out' screen to show it would still progress me to the next level; so I dont know if there is a more frame-perfect way to get it to rewind post portal touch.

Anyway good game and aside from those minor points I dont see many concerns.

Pros:
1. Colors are awesome, the art part is also good

2.Decision to add timer is very good, make me think faster and always stay concentrated

3.Music is good and fit the theme 

Cons:

1.There are some problems with jumping, it is noticeable at level 3

2. There are no much animations

Loved the color theme and how everything was put together visually. Some animations for the palyer character would've been a nice addition though.

Great music and color, though it's a bit slow to control.

Well done, I like your art style and music!

Love the art

Music is nice

liked the game idea , keep it up bro