I doubt this is all of the commands, as I keep finding some every few minutes. Here's a list of what I've found so far. Feel free to add to it. Very interesting game, and fun to spend time on.
locations:
red, orange, Christmas tree, constellation, alien, win, play, ocean, underwater, holiday, pink, green, hill, lava, call, grass, brown, flower, tower, street, sky, river, rock, autumn, winter, dark blue, blue, we're already there, we aren't there, space, asteroid, lagoon, beach, shrub, demoscene, sunrise, doom, morning, night, heaven, hell, there, nowhere, christmas, rainbow, secret, snowy, marsh, docks, stair, desert, galaxy, lake, forest, devil, emerald, bridge, cloud, beneath, utah, arizona, evening, palm trees, statue, park, ufo, city, outback, island, hotel, fear, design, sodium, bastion, castle, somewhere, nobody is there, tourist, place,
filters:
disco, dance, warm, cold, star, infinite, cage, art, cycle, backwards, forwards, chaos, normal, travel, white, black, snow, rain, fog, sunny, light, dark, glasses, 3d, gradient, black and white, blackwhite, teleport, static, wobble, bubble, monochrome, glitch, spider, dust, gameboy, flare, staircase, happy, sad, internet, life, camera, instagram, reflect, vr, cinema, art, video, movie, vaporwave, pollen, glow, mist, embers, vivid, cry, pixel, love, warhol, photo, fov,
sound:
music, audio
item altering commands/misc:
ring, row, explode, question mark, random, answer, stuff, clear, object, spin, line, up, down, answer, small, big, huge, tiny, smallest, biggest, flip, left, right, close, closer, farther, far, fall, sepia, game, tidy, back, reset, delete, restart, backtofront, atom, orbit, lose, matrix, nuke, death, in, out, vvvvvv, faster, slower, fast, slow, gun, connect, disconnect, sine, cos, undo, distribute, bye,
helpful commands:
back, reset, normal, audio, delete, filter, clear, restart, random, tidy, nuke, begin, death, begin, fov, undo,
items (not their plural forms):
house, lighthouse, tree, ball, circle, square, triangle, sphere, child, man, woman, computer, chair, phone, egg, shark, extinguisher, pear, person, fish, moon, planet, earth, sun, window, bone, skeleton, skull, cow, bush, deer, book, read, word, doll, hat, cowboy, horse, watermelon, car, gift, animal, cat, dog, turtle, traffic, cube, stripe, pizza, hand, mars, breakfast, coffee, croissant, scribble, meow, apple, wireframe, donut, pyramid, pineapple, bucket, clipboard, queen, hourglass, laptop, duck, penguin, guitar, secret, fruit, tube, vaporwave, pillar, lamp, mug, face, plant, friend, notebook, polygon, bread, hello, goodbye, king, bear, cup, milk, time, hi,