What platform computer are you on? Mac, Windows, or Linux? Also where does the red exclamation mark show up? Is it on the game icon?
Sorry it doesn't just work for ya :/
Viewing post in Cant start the game
Windows 10. When i start the game theres a small window that loads up unity. Right next to the unity symbol is a red box with a white exclamation mark. After it loaded it just does not start and doesnt say anything, the itch.io launcher just sais "last run 2 minutes ago". And dont worry i still love your game and what you do with it, i just wanna play it myself ^^ keep up and much love for your fan interactions.