Thanks for all the feedback! Happy to see you got to the end. I think you had the most money of anyone we've seen play so far.
You don't actually take damage from the crystal at the end, but we left the knock back in there to give players another opportunity to learn that the crystal is important (and maybe to add a little surprise as you experienced).
You bring a good point of how the loot is balanced - we intended for the first 2 or three floors to be the 'learning area', but we've seen a few players just use it to grind out money. So we see the issue there.
The other quality of life stuff is fair critique and things we just didn't get around to (namely the snake venom hitbox being too large, the annoyance of attacking and accidently going up/down the ropes, and text clarity). They are all on the road map for a cleaned-up post jam version.
Thanks for all the feedback, and thanks again for playing!