I can't really qualify this as a game since it has no rules or goals, as it fits the criteria more a toy. But still, this toy kept me occupied for like thirty minutes. I believe you meant this as a relaxation tool, and boy did it work!
If you would like to see my submission, please check out Napalm Town: https://itch.io/jam/gmtk-jam/rate/159296
Yes, it's as you said. The eternal 'what is a game' question, if Dear Esther or The Stanley Parable are games and so on. But it was deliberate to leave the scores and goals out, they did not fit into the feel I aimed for in the end. And yes, it did eat a surprising amount of my time just jumping around as well :D Will give your game a try as well, thanks ;)
Well, it has rules in the sense of your control scheme, how you build up speed, and your interaction with the obstacles. But you're right about there being no explicit goal. That being said, I'd argue that there is an implicit goal of trying to go as fast as possible without bumping into things. This could have been highlighted with points and a high score board, but, as the developer said, that's not the feel they were going for.
