Press space to begin, then press m to show the menu. Drag any player to a random spot (make sure to not let go until it gets to the spot. After that, press the play button. Then, shoot balloons. After level 1 (when the balloons stop coming), press the play button to go to the next level. You can buy more players as you get more money from balloons. Have fun!
Background from another project. Sprites from Scratch/another project. Credit to @Teal126 for helping me with these instructions.