Simulation

oasis.decart.ai/starting-point - This site allows you to play a Minecraft world that is completely AI generated in real time.

littlealchemy2.com - A game where you can discover new elements by mixing the basic elements (water, air, fire, earth). It's quite addictive.

geo-fs.com - This site is a flight simulator. İt needs a lot of control, so I recommend checking which buttons do what before playing.

slowroads.io - This is a car simulator, but with less control. (According to geo-fs.com it's less) There are endless roads and no end.

oskarstalberg.com/Townscaper/ - on this site, you can add buildings by left-clicking, remove buildings by right-clicking, and set day and night in the settings. If you don't understand, go to the site and left-click on a house.

chunkbase.com - If you don't play Minecraft, you can skip this site. You enter a Minecraft seed into this site, and it tells you what's happening around the seed.

messenger.abeto.co - This site isn't Facebook Messenger. On this site, you play the role of a child who receives mails from others and forwards them to the intended recipient.