Orbs are not saved between runs, so you only have what you get in one run. Or are you saying you got 0 orbs from each run after some time?
ok, so I collected orbs, died, and in the upgrade menu, the orbs were not more than before, sometimes even less. so no matter how many times I went in for another run, no matter how many orbs I collected, I was not able to upgrade anymore. Maybe the issue is that I played on Arc browser instead of Chrome?