So I think forteresse is SUPER fun, and it should not be changed. If there are people out there who want it to change a small bit, here are some ideas.

Ok,you know the maps where you only have one life? Well, I think there should be airforce. Only one person from each side, and then by, using the same keys to move, you glide through the air, you have around 11 lives. The two airforce pilots, would shoot each other down by just pressing the mouse as usual. If you get shot down, you are out. Now, by pressing space, you let down a bomb, you only have one shot, if you use it, you are then teleported back to the ground to fight. The bomb should be very effective, stronger than the dynamite in the game, and should damage or kill, the other team. If two planes just survive in the end, its just a fight to the end, to see which team wins.

A map of the level would be good. It should only show you your team, because it would ruin the suprise attacks of the other team,lol. Red dots are your team, the blue dot, the escort of your team, and of course, an outline of the map, it would only take up a small corner of the map.

A new character, a parachuter, who floats dow to the ground, they are like a normal soldier. They can move and shoot in the air. When they land, they are just normal.