Enjoyment 3.5/5: I enjoyed what I enjoyed but I really didn't enjoy the other parts. The platforming was a mixture for me; there were a lot of really good ideas but I also ended up very frustrated by some of the platforming rooms and respawn point choices. It might have been a bit too 'fast' for me generally.
Execution: 4/5: This is a game with a lot of cool concepts but it seems like a lot of design choices were more frustrating than necessary, and in at least one spot, made the platforming unnecessarily difficult (grapple bug.) Sadly this category is often linked to enjoyment in very real ways, hence the score of that admittedly more subjective category being lower. On a purely design level I would rethink your use of respawn points.
Sensory 3.5/5: Visually this is great. Audibly it worked alright. I am bumping enjoyment up to 4 to account for the two .5 scores.
Metroidvania: 3/5: While you definitely get new mobility abilities, this game feels ultimately like it's more of a linear series of open-eneded areas rather than a single cohesive world. I realize doing a time-travel MV on the level of, say, Chrono Trigger (jRPG I know) or more relevantly TimeSpinner, would be a lot for 30 days.
Relevance to theme 5/5: You are literally time traveling to defeat your past lives. Even by time travel standards I don't think it made any sense to me but this is about THEME RELEVANCE, not SENSE-MAKING, so it's a 5/5.