Hi Ellis! This was a neat little game! I would definitely recommend more levels as I though it ended quick.
Positives:
1. I like the jump time, maybe speed it up a little bit but otherwise its good.
2. I like the aesthetic and the overall vibe of the game.
Suggestions:
1. One thing I suggest is to bind the Restart and Menu to keys instead of switching to mouse. It's not a big thing, but really adds to ease of use I think.
2. I'm not a big platformer player, but the game felt quite easy to me. Highly recommend going wild and adding more mechanics in the future levels.
All in all, good stuff! Have a nice day :).