Don't have anything planned right now but will do if I come up with some nice additions.
Some would be just add more items. Also more races. Even bosses every 10 floors. 1 boss that has randomly generated loot, but has a minimum of like 10k at level 10, and multiply that by like 1.2 or 1.3 for every boss after. These are some really good suggestions to make the game not so stagnant after floor 150 or so.
To use a reply you did to a post, "Nope, it’s endless and even the difficulty starts not getting that much harder other than the other player characters you face more frequently. " People are pretty bored after a certain point. So if they have a boss every 10 floors that has massive HP, they have something to look forward to.
Yes of course I'm open to suggestions! And boss encounters indeed are something I've been thinking of too. I think they'll need to be a bit more than just HP sponges to be interesting though. But I do have rough ideas for few ones already. If you come up with something cool, feel free to bring it up and I'll surely take it to consideration. Same goes to items and races of course.
For items, I was thinking that you could implement a scaling effect system for a certain level of damage reached. For example, if a character has 100 slashing damage, they get 10% more slashing damage. Same goes with health and luck, speed, etc.
For races, you don't have a race that's immune to lightning, and none of the physicals (although please keep it no physical.) You could create a new race that has something to do with rubber or another non-conductive material.
Also, in what country do you live, just so I can know time differential and when to expect a response. Because I live in the west coast of the U.S.
I live in Finland so I'm on UTC+2. I feel like allowing rotating might be too good. At least if you could freely do it as much as you wanted. It would take away too much from the actually trying to squeeze in your wanted items (in the early game). Freely rotating would pretty much neglect that whole design aspect. Maybe store could offer some kind of rotating services for a fee or something along those lines.
Do it as a boss reward. Floor 50 boss drops rotate token or something like that. Also, good idea for bosses is to make them have a unique skill. Have like three skills, but as the floors go on, the skill increases in potency. for example, floor 10, 10% more slashing damage. 20, piercing. 30, blunt. 40, fire, 50, ice, 60, thunder. starting on floor 70, increase potency to 20%, or something along those lines. Also, doesn't have to be in that order specifically.