Thank you for all the comments. Life has got in the way of doing any work on this recently.
Over the next few weeks I'm going to try and add a user profile section so users can add their own clothing and view their history etc.
I think I'll also give users some more feedback on how they did - either the target time and their actual time, or maybe maintain some mystery and tell them how far away from the target time they are.
To make these changes I might end up clearing out the database so if an account no longer works then just create a new one.
It is great to see people using this and coming back to it multiple times