cute cartoon poster, background on the theme of alien invasion, ufo, first contact. we come in peace - lettering

ufo alien vector space background spaceship flying saucer cute cartoon doodle poster flat lettering peace science backdrop outline funny unknown unidentified martians sci friend contact banner horizontal star title cosmic monster technology cosmos extraterrestrial character invasion secret astronomy civilization halloween moon bright color multicolored kid hand drawn inscription colorful theme hand-drawn style contact lettering style