Me too. I figured they were asking for the twigs, so I got all 7 and the box turned into a check. Turning in the quest was a little funky but overall I'm pretty sure it worked.
Stamina as in running, right? I felt like my stamina was really high, I don't think I ever really ran out (I didn't run for too long though, maybe a 4-5 seconds max). Sprinting was a little weird though and sometimes it bugged out and teleported me back. I couldn't figure out if you had to press and hold shift, or just press shift once. Whenever I tried to stop running it was also a little slow, or took a little to register that I had stopped trying to sprint.
Was there a hotkey to instantly target the closest enemy/friend? When I was first starting to fight, I tried pressing E and it seemed to work and target the closest enemy, but then it stopped doing anything and I'm not sure what happened. Being a melee attacker was a little difficult, like clicking the enemies. As for the skill hotkeys, the order seemed off. The topmost right skill seemed to be triggered by pressing 1, but then the one to the left of it was triggered by pressing 4. I think a little clarification/description would be helpful too, maybe like being able to hover over it and it'll give a number/etc.
I also really agree with the idea that enemies should instead gain health slowly, instead of instantly resetting. It was impossible to solo the mushrooms because of the knockback.
Thanks for running the test though! It was fun to experience the game first hand, and I can't wait until it's released. Looking good so far!