I think the game is bugged. It crashed on me just after I got to floor 2.
Viewing post in The Purple Tower jam comments
OK. I played the game four more times. I don't think it is a browser issue, it happened to me on Chrome and Microsoft Edge. I actually managed to complete Floor 2 on Edge but it happened again on Floor 3. All I know is that the screen flashes and stays red as soon as a I start it, and then no input from me will register.