Truth is I've only really been playing around with PyGame at all in the past couple of months and I'm very definitely a secondary teacher who programs now rather than a programmer who teaches. 

But I thought I'd have a crack in the hope we might create something to show the students. 

To keep things bordering on impossible I'm going to use the same library we get our Year 9s using: PyGame Zero. This means it is simpler to get something up and running, but if we build the sort of game I'd really like to then it will likely get brought undone by the simplicity. 

Can't decide if this is woefully pessimistic or I'm just terribly optimistic given I'm going to give it a crack anyway. 

After a few days of getting nowhere due to being dragged away by paid employment and family life - made progress yesterday

• Have a game that is still awaiting actual user input interaction, but has set up a way of creating a level from a json file
• The concept feels like it can turn into a playable game: Tube Chase: place your coppers to catch the mystery suspect escaping on the London(ish) Underground
• I've got the underlying classes basically built. 
• Think (?) we might have something playable for the week

More than a little chuffed. 

It's not a great game at all, but it's a game. Sounds, music, graphics (of sorts). Missing a couple of things I'd hoped to add, but on the whole: got there! 

Something is going to be submitted. Very pleased.