Press play and watch what happens. There's no way to control them, just watch and pray they reach the flag. I'm not sure when I'll make another actual game, but until then enjoy these random projects I make.
there's an unnamed custom block in the bird sprite with a number value. change the value to spawn more or less birds at the start. Updates: 6/12 - Added multiple levels (birds may or may not be trapped in purgatory afterwards)
