It seems your game can't be played. You only uploaded the EXE file, as it's a Unity game, you need to upload the whole folder including the UnityPlayer.dll and the MonoBleedingEdge and Data folders.
Viewing post in Last Standing jam comments
It works now! Cute little game, I really like the character and enemy art style. If you created the sprites for the environment as well, I think this game would really stand out over all the AI-generated art and free assets a lot of people (including me because I can't draw at all) use for game jams.