Well, it was made with... drumroll... no framework at all! It's all in native Swing. To be honest, we didn't even use an IDE for most of the development cycle. The tools were very modest given that it was just meant to be a little school project. I might write an extensive devlog about the technical details of how the graphics were made sometime, if enough people are interested!
The school project spanned over 9 weeks, but it was secondary as we were busy with full time classes and other more important projects / exams, so we mostly worked on it in the evenings or during vacation. I was personally extra-invested into it, so I tracked my hours of work during that time and have 200 hours on record.
After that, I took some extra time during summer vacation to add sound effects and implement some scrapped features, but I was very inconsistent and scattered in my work (+ didn't use a tracker) so I wouldn't know how to estimate the actual amount of time that took :>