Hey so I cant launch the game either
Dont fret to much about stuff like this, this happened to me during my first game jam too. It was stressful haha.
^ one of my entries that seems to work
Im not sure why sometimes unity doesnt seem to include the UnityPlayer.dll, it might be a compression issue im not 100% sure tho. Ill copy it over and see if it works tho.
I couldnt get it to work but moving things. maybe try rebuilding the game, im not sure how to fix this issue personally sorry.