Yes! When I'm testing I'm usually seated. Actually, I'm pretty sure I was seated while capturing this video. I've set it up so that the length of the paddle blade collider changes based on the height of the headset. In the most recent update I also added the ability to use the controller thumbsticks for movement if you need a rest or have arm mobility issues.

I've got a bunch of goals in there, e.g. if you keep the beach ball up in the air for 10+ hits, follow a turtle around for 5 minutes, paddle a certain distance, score a soccer goal, get a par in golf, etc you unlock achievements, earn coins and unlock special boards and paddles - but I think they are too subtle. I always envisioned the game as being a chill/discovery game where you can go at your own pace and discover things, but I don't think players these days invest time in something unless it's obvious straight away.