The ability to change the opacity of various things is incredibly smart. Excellent feature. Did this and then was able to clear it with no deaths. With that as the goal I thought the difficulty was really good. Though I'm not sure how to feel about the fact that my main strategy was to conserve at least two bombs for the end so that I could basically ignore Kogasa's last phases haha
With respect to goals, I might've liked to see something more explicit as a goal besides 1cc, given how relatively easy it is to get through this without getting a game over with the default number of lives. I do understand why this is done given the target audience and that this is a game jam. But maybe just some "bonus" goals like perhaps a special screen for clearing with no deaths, or a set score to aim for. I'd say personally my intrinsic motivation when it comes to doing things in games is probably higher than average. That is to say, I was ok with just setting what I consider to be a satisfying goal for myself and meeting that without the game leading me there. But for more extrinsically motivated players, something more explicit could go a long way since the default 1cc on its own is relatively easy.