The visuals are so lovely and charming. I'd definitely love to see you expand on this with more levels as this is a really fun concept! The music compliments the minimilastic art style and cute character design, and gives the whole game a lovely vibe.
A few critiques: The timers are very unforgiving. I think the difficulty this creates is fair enough for a jam and I enjoyed it a lot. But if you do decide to take this further, I'd suggest making the timings much more forgiving by default (perhaps an optional hard mode or something to push people and make them sweat a bit! Or a ranking system for going quickly)
The other main thing is the controls. It's very jarring to have the inputs be offset by 45 degrees, but I think this would be an easy fix that would benifit the gameplay greatly, as you have already showed off some great level designs!