2D Scratch Game

 My scratch game is going to be a 2D player vs enemy game. The player stands on a platform at the bottom left of the stage, and enemies spawn on platforms anywhere on the right side of the stage. The player has a spear which they have to throw at the enemies, with the objective of killing them before the enemy can fire an arrow at the player. The enemies will fire arrows at the player, and will successfully kill the player if they hit them with 3 arrows. Simple physics will be used for the direction of the arrows, such as the parabolic arcs and power put into each shot. I'm considering whether to add a 2 player mode, as the mechanics will work the same, but with someone controlling the bow and arrows.