I liked this. It feels really well put together for a jam game, multiple levels, etc.
I like the idea of finding the memories - though as far as I can see only one made it into the game? (the horse). It didn't seem to communicate why (or even that) you could now double jump after finding it.
Would the intention have been to introduce more mechanics as you find more memories?
I found the jumping a little unsatisfying - I think you could play around with the weight of the jump a bit more to make it feel better - but that's something that happens over a lot of tweaking, not a 2 week jam.
Do finish it off as I'd like to try it again :)