The Gorilla Arms upgrade is definitely the best thing that happened to the runners :D That upgrade works well, generally...
It doesn't work when you have your runners buried under a field of gems. The Yeet doesn't throw the gems back if there's too many gems on top of it.
(Also you can see in this screenshot what I was trying to explain in the first comment - there's no way to beat even a single den at this stage...)
Yup this is a known problem with Gorilla Arms, that they can be a downside if the thrown gems get blocked by others. But I'm not entirely sure how to fix it yet. I keep increasing its throwing velocity, but I don't want to do something like disabling thrown ore collisions. Checking if runner is buried in ore before throwing is also not an easy solution. The best solution is probably to just prevent situations where the entire field is buried in thousands of gems. At that stage even the mountain's ore sucking system can't upkeep with your production. Will have to tweak that further and hopefully as I mentioned in the comment above, all the new units will also help.
