på vejen i think can also mean 'on the way' - en route' to somewhere, not only literally on an actual road
You're right it can mean both. I would try not to use spille when you'd say play. Spille means something more similar to "game/gaming" its an action not just a general behavior.
Why does 'on the way' not work here?
It should, report it
How can I report excercise I did some time ago? I am asking in case I got similar piece of advice.
Fail the exercise the next time it comes up.
It's not clear, why isn't there an "at" before the "spille"?
Yea, it's complicated, but you should read the "tips" for this unit. It helped me.