I really liked it. It’s a bit buggy and could use a bit of polish, but the important parts worked well and were engaging.
The puzzles provided a nice amount of challenge, the art and movement mechanics were pretty nice and polished, and the concept as a whole is quite creative.
There were some issues with collision and the past self pushing the present self around, the menu was a bit glitchy/unfinished, but those are pretty minor nitpicks. Another issue I had was that the “story” prompts embedded into the levels were quite easy to miss. In a full release something like a voice over narration might be better, or providing pauses in the level where they pop up as dialogue boxes (should be easily skippable though if this approach is taken).
Overall, really solid and compelling.
[EDIT: I just noticed the game has 69 ratings, and many of you would probably say that I should leave it unrated to maintain the “nice” number. However, I think that would be considered bad form so I have to ruin it by leaving a rating. Sorry everyone.]