This was so fun to watch!

It was especially helpful to see what you and your friend found confusing. The filling/depleting of the water resource has tripped up many players, so I can tell it should be made clearer. You did eventually realize that you need to splash hydrants with balloons, but there's not a clear animation or sound effect when picking them up, so it's hard to tell.

There was another mechanic that snuck by unnoticed, which is that driving on sidewalks causes water to leak. Although there's a sound cue when hopping a curb, the visual feedback for this mechanic is vague, and there's only a brief mention of it in "How To Play". Still, I felt this mechanic was important to include, because it gives the Tiller more purpose by giving them some responsibility for maintaining the water supply.

Again, thanks so much for sharing your playthrough video!

Thanks for your comment!

The difficulty progression is something that changed around a lot during the development process. As it is, the time between swaps decreases by 25% every minute, according to an exponential function:

For game jam games, I think it's a good idea to make the average play length short, around five minutes or less. This is why swaps happen more and more frequently, to make things harder. Fires speed up, too!

I definitely like your idea of a "learning mode". Ideally, I wanted to make an interactive tutorial that allowed players to drive around in a sort of sandbox level, so each player could practice each role without any time pressure. I didn't end up having time for this during the jam, unfortunately. If I ever come back to working on this game, that'll be one of my goals.