All right game, though it's hopefully just a template for a more complicated one. Right now it's not very exciting.
Some obvious bugs: when you reach level 3, you appear to gain a bonus to damage, but it doesn't come into play.
Dagger does 2 damage, and sword does 1. That's...weird?
Killing a monster via monster killer (which is a silly item, by the way) gives you no experience, but damaging a monster with it then doing the killing blow does.
You really should have different icons for health potions and monster killers. It shouldn't be difficult to distinguish them for the player.
Picking up weapons is mostly pointless. There are only two, and finding the starter one is just a waste of time, and finding a better one means the older one suddenly becomes useless, unless you intend to allow selling later.
If the maps aren't randomized and changing, I suspect there is a bug in the movement controls, because features are not always where they appeared to have once been. For example, once I find the ladder down, the ladder down can be found in multiple directions, and is difficult to walk away from. There aren't really any features that distinguish location, like walls, so it's mostly just random wandering. I don't get a sense that there is any difference between going forward and turning, except that you can sometimes find items you dropped, but not always.
If monsters do standard amounts of damage, something is wrong with the life bar. The last blow that kills you seems to happen when you have more life left than is usually taken off by one blow. Along a similar line, you really need to distinguish more that someone is actually dead. One feels a bit silly pushing buttons for a while before noticing the message.