Great atmosphere and art. The gameplay got a bit tedious pretty quickly, but I like the idea of condensing a large group into a more powerful, smaller group.
I wasn't entirely sure what the potion upgrade did? And it felt like the attack up was basically the best one to pick every time? Though being able to click/press space fast did seem to be the most important element.
Anyway, this was very charming and looks really good; I would have liked some more mechanics, and maybe something other than clicking to do damage (e.g. an autobattling kind of thing?), but that might be a preference thing on my part. Nice job nonetheless!