I generally find that the first 3 levels are the most fun. Usually by then you have the necessary skills and at least enough gear to get by that from then on the game goes into auto pilot. The problem is, floors 4-15 even with no time to grind takes hours upon hours to finish. It's pretty easy to take over an hour per floor. Heck it can take an hour to clear a zoo! So what if there was an option to have the game end on floor 5 or so? By that point you've encountered just about everything. You probably have a few pieces of really solid gear. You've come across plenty of consumables. You've also maxed out a skill tree or so and hit about level 15. Why not just have a coffee break mode with the level 10 dredmor on floor 5? I'd love that! Plus taking on dredmor at that point in the game would be really challenging. After floor 5 or so I find that I start to lose steam on my play through and get bored. While this really wouldn't be a coffee break dredmor (the best way to do that would be to throw a level 5 dredmor on floor 1), this mode would take only 3-6 hours or so to beat. But you know, a mode that ends on floor 1 might be fun too. The first floor is the most fun... I think if you guys port to the iPad you might want to look at putting in a game play mode that is very short (30 minutes to an hour) and challenging.