My first jam as well! I'm curious as to what engine you used. Did you just code it all by hand in java?
Viewing post in Arena of Dodging jam comments
Yes, I coded everything by hand, It was around 1700 lines of code. Maybe it would be better to use a game engine, but I have tried Unity and did not like how it worked. I used 'JFrame' to actually make the window and used 'Canvas' to write to it. The code is somewhat messy, but I could give you the source if you wanted.