I really like the idea, and it can be interesting trying to find the best way to stall until your die reroll. Outside of combat, movement can be a bit annoying though since you cant move until you get more movement actions. Also, nothing major but i felt like the crossbow traps didnt really work well. At one point, I did manage to use them to hit an enemy but it was by chance. They just dont really feel like they fit into the whole improvise on the fly since you cant really use them to your advantage in intentional ways. Other then that, I thought it was pretty fun and I would love to see this concept explored further!