I had to disable my antivirus and redownload the game a few times to get this working, but it was so worth it. The levels are well designed, scale at an appropriate difficulty (with one exception, mentioned next), and I was left wanting more at the end.
I was confused by the third level, "Triple Jump," which I think may have been a mistake/oversight. The rat was used here before being formally introduced. I figured out its bouncing mechanic by accident, but was then confused later when it was given a few tutorial levels explaining its mechanics. This level also includes a mention of wires connecting the buttons and platforms, but I don't see what this references?
Also, somewhere along the line the level names stopped displaying properly and it just said "Placeholder" there.
I usually pay particular attention to the music in Jam games, but I was having so much fun I forgot to do that! I didn't notice any annoying repetitions or awkward balancing of sound/music volumes, so I guess it was all implemented well!
Edit: after posting this I have since remembered that when I launched the game for the first time yesterday, I was immediately captivated by the music on the main menu. A great first impression that made me want to see the game!
The mouse animations are adorable and well done. Kudos to the artist! I particularly loved the jumping animation, and how to rat rotated in the air instead of remaining flat as is typical of a 2D game.
Overall, this has been my favorite game of the jam so far. Great job! 5/5 If you continue to develop this game/make levels, I would love to play them :D