Walkthrough:
You start in front of some cubes on the ground; walk past these until you get to the giant teapot. Then go around the teapot to the right, where you'll see a tiny banana and a large goblet. Continue walking past the goblet and a fast-food drink until you get to the bell pepper. Around the back of the pepper is a small ring spinning on the ground. Stand over the ring until a noise plays and you end up in a room with 3D heart shapes floating around you (you may want to move the mouse around a bit to fill up the screen with the heart shapes, as it starts out mostly black). Look for the falling blocks, then walk towards them until you're teleported back to the main level. Walk past the cubes to the teapot again, and this time go to the left. Past the Newton's cradle you'll find a teddy bear in front of you and a large floating key to the left. Between the key and the teddy bear there is another spinning ring; stand on this one until you end up back in the heart room. Walk towards the falling blocks again; you'll then be teleported back in front the cubes on the ground. It will look like the same level at first, but you're actually in level 2 (at least that's what I call it). Walk past the cubes, the teapot, the banana, the goblet, the fast-food drink, and the bell pepper, and you'll notice that the Newton's cradle is now here instead of next to the teapot. Walk past it (and the key/teddy bear) towards the falling blocks in the distance as a droning, glitchy sound gets louder and louder. If you get jumpscared by a loud sound and a man floating in the sky, you've either gotten the 1/3 chance of the game being in "scary mode" or you typed in "scary" during the title screen as Branta Games mentioned in the video. After this, you'll be teleported to level 3, which is almost the same as level 2, but the game is no longer glitchy-looking (so screenshots are now possible). Walk past all the items mentioned above, until you get to the key and the teddy bear. Now there are no more falling blocks, just blackness. Walk into this until you hear two beeps and the game closes. This is the end of the game (which I'm guessing symbolizes escaping the simulation).