I regret not compiling my game earlier. It took way too long time to compile and I was very worried all my work would be for nothing. If I had compiled the game earlier it would have gone faster to make the final build (it would be able to reuse some compiling steps). Fortunately the deadline was extended due to the server overload, so I could finish building the game in time.
But then I found out that the title screen looks bad in some resolutions (like in the browser build), which I would've found out earlier if I had time to test the build before uploading.
Here's my game btw:
https://itch.io/jam/gmtk-2019/rate/463448
