Gus vs The Aliens

Gus vs The Aliens(My 2nd game with Game Maker Studio, first was a Space Invaders clone)Gus is chased by Aliens from planet to planet. He first needs to pull the levers in order to get fuel for his Ship so he can reach the next level. However the Aliens land a UFO and begin to remove the rubble between their ship and yours, should they clear the way before you finish the level, the UFO will open fire and destroy your ship, which is instant game over!The way to beat the Aliens is to collect sticks of dynamite from each level, once you have 20 sticks, you can place them under and UFO and destroy ...