Nice project, I especially enjoyed the quick no-nonsense introduction slides with their fun illustrations! Your restart mechanic was also great as it removed any frustration over loosing.
Like the commenter below I found the third level a little too hard after breezing through the previous two, so could be worth reordering or adding in some more levels between. I think the issue was that it relied on a different version of the mechanic that we hadn't really used yet (jumping higher after waiting).
I also found the music loop a little too short, so it started to get to me when I kept failing haha.
But love the concept and style and could definitely see this being fleshed out into a really fun quickfire experience.