Ok, so we are slowly getting there: today I completed my first walkthrough from start to finish, while checking for bugs, errors and parts that should be polished. No enemies.
This is probably the least fun part of game creation, the moment where I got bored on my first project and got stuck for many months, until I finally decided to bring it to completion. However, this time I have a deadline, that is the jam deadline on January 9th. I will probably upload the playable game a couple of days before that (I am aiming for January 7th).

Tomorrow I plan to start placing the troops and check the game balance.