Adventuron is an adventure authoring system. If you follow the tutorial, you will be able to see that.
Adventuron is a full-blown language. The editor runs in your browser and allows you to develop a game and test (or play) it at the click of a button. The editor includes syntax colouring, code hints, auto-completion and so on, just like any modern integrated development environment (IDE). When you’ve finished developing your game, you compile it to a single HTML file. The compiled file includes the Adventuron interpreter and your game data. Anybody can then play your game on any device that has a browser, including mobile phones, although games with graphics don’t leave much room (if any) for the text once the phone’s virtual keyboard takes up half the screen real estate.
There are lots of Adventuron resources out there if you care to look. This tutorial is one of several that Chris has prepared. If you follow the tutorial, you can see what Adventuron is and how to use it.
At the time of writing, at least 85 games have been published using Adventuron. There have been four game jams on itch.io. The most recent one had 7 entries and is currently going through the judging phase. There are 6 days left for judging. Most of the games are very good. When you consider that some of the games are written by first-time authors, that is very high praise indeed for Adventuron.
To play the games from this jam, see https://itch.io/jam/next-adventure-jam/entries