The different visual styles were all really interesting! The intro scene reminds me of a comic style, especially with the fun motions and expressions going on. The sprites had a good crispy feel to them as well, even if I was slightly surprised by how fast Youmu was running. Also, green-haired Yukari and gardener Marisa were fun stylizations!
The premise was funny, so I was eager to see how the rest of the writing was. I did notice some inconsistencies as if rushed, and would have been interested in how it closes out, but the mushroom puns made up for it in the meantime. :3
In any case, the concept of a platformer with Youmu is very fun, and I look forward to seeing what you all do next!