Thank you for your awesome feedback!
Yeah, there are still a couple of bugs in there—the main one being that higher-rarity weapons are not spawning in chests. Also, enemy abilities are displayed but not yet active in this update.
When you die and the inventory becomes invisible, you can just press R to restart the current room and it will go back to normal.
SPEED determines who starts first in fights; it will also work with some item passives when they become active in the next update.
I submitted at the last minute, so I didn't have time to check for those bugs. I'm working on the fixes right now! :)