Thank you for sharing! Not tacky at all, I love to share people's experiences with my games. I'll be sure to watch the whole thing soon.
The combat is designed to be easy and quick. I will take into consideration the Hard Mode option as other feedback has indicated the same. I've had a few Delves where I was completely stomped by the game and thought it too hard but having the options for players is always good!
Building on the custom character system you mentioned, I have a rough outline of how it works done and will be testing it for a bit before updating the game with the rules. It is pretty straightforward and I hope people can make some broken characters with it, or even just challenge runs. It also opens the door for custom character creation for community content, which is something on my to-do list for Troves.