Fun fact: the dungeon floors actually used to be larger, but I already reduced their size. I get what you mean, though. For now, I added a run button to make exploration faster.
What's the run button? Do you mean the run badge?
The run button will be in the final version (it's not in the beta). Press k or whatever button you set to Back (in menus) to run. Can also be combined with the speed-up badge .