Welcome to Guard Mk.I, the objective is to gun down the enemy skydivers, while also destroying any other objects that pose a threat. With more points, you unlock more levels, with more enemys, rocks, rabbits(?), etc to destory with more points to gain. Then when you think your finished, submit your score to the leaderboards and see how you rank agaisnt everyone else!
Guard, Guard Mk, Guard Mk.I, Mk., Mk.I.