outline alien head with big eyes in doodle style. simple clip art on theme of ufo, space, kids

alien illustration isolated vector head ufo background face outline doodle black character icon eyes space extraterrestrial cartoon symbol invader cute futuristic clip art humanoid halloween horror paranormal fantasy star roswell invasion coloring civilization science outer contour smile unidentified cosmos sticker kid fiction unknown martians emotion line sci travel secret saucer astronomy big style simple theme kids design white style design background