Yeah, about 3 hours. If I start again, I guess it would be around 1,5hours (if you don't take stone collecting into consideration).

The pace is pretty good for a short incremental game.

Personally I could imagine a slower pace.

I basically took the starters in the first area and rushed through with them. If there's a slower an more strategic pace, pokemon management would have to be improved.

- manually swapping your team members to the front

- arrainging pokemon in the boxes

- possibility to release pokemon

It could be that I missed some of these options.

Some other suggestions. 

- I finished the run with more than enough pokeballs. Collecting them is way to easy. I don't quite remember, but you can find the best balls right at the beginning. This is a bit overpowered.

- Prestiging a Pokemon basically raised there level +1. Based on the fact, that you level pretty fast right now, it is ok, but also pointless. In my opinion leveling to 100 could take longer, but prestiging should boost way more.

- Every shard can be gained everywhere. This could be based on the area you are right now. Makes collecting the last pokemons easier and you want to progress to later areas quicker.

For a quick dopamin rush, the game is good in the current state. There is no slower pace necessary. I loved to play it. Very good job.

And of course. Everything I wrote is just my opinion. Experience and suggestions definetely differ.