From the games of the jams I have played so far the action of switching between the gun and torch has had the best balance of simple and satisfying which gave the game a great game feel!
If anything could be improved in a potential future version might be to add a slight ping or hint where the final enemy is when there is only one left after a bit. Hunting for the last enemy breaks the flow of the game a bit. (And with my luck it is always on the other side of the level. ;) )