Is it a requirement to write the game in Unity or any other game engine? Or can you write it in C/C++/java/etc.?
My entry last year was written in Python using only a graphics library (pygame). There aren't any restrictions on what tools you use.
Something I saw recently for this workflow: you can insta-port PICO-8 code to standard Lua code by wrapping printh[=[ ...]=] around your entire source. This will convert PICO-8's !=, +=, if one-liners, etc. back to Lua, for use in things like Love.
You can work in any language.
