Really like it! I usually give really detailed feedback, but I honestly don't know what I would recommend to improve in this game! I think it does what it sets out to do very well!
Things I liked:
>Simple game premise that was executed well
>Fits the theme perfectly
>Graphics and Audio are very nice and stylish and fit the game well. Well utilised.
Things to improve:
>Hmmm, I guess a couple more levels would be nice :) (that means I liked it haha)
>I think there was a point on the 5th level where the rewind got a bit out of sync with the images it was getting rid of (as in the memory images of the character were disappearing before the character was rewinding up to that point; maybe cause I did a big jump from the top platform with the gem down to the middle platform). Was only a very minor issue, didn't really affect me too much; but I imagine it might bother me if the level was longer and the sync issue got bigger (but i didnt notice it on any other level).
>A harder mode would be cool (you could make it so that the rewind happens slowly whether you like it or not, and you are just in control of whether to speed up the rewind or not?). I found the rewinding aspect to often be easier than the first run (provided I didn't confuse myself by doing lots of unnecessary movement on the first run through) because I could freeze my character mid-air to wait for obstacles to pass (something you cant do on the normal run through). So perhaps having a harder mode would ensure the rewind runthrough is as challenging as the first run through.
Overall:
Great game! Really enjoyed it!