cartoon cute funny alien in flying saucer, ufo. out of this world. simple color in flat doodle style

alien flying saucer cartoon space spaceship ufo vector poster ship green flat bright spacecraft science cute astronomy cheerful clip art outline doodle outer funny boy kid sci pessimism martian futuristic technology color colorful lettering symbol cosmos civilization vehicle hand drawn background extraterrestrial humanoid halloween unidentified cosmic avoidance escape reality problem unbearable world simple style icon topic problems ufo world style problems