That was a lot of fun. Menu-driven gameplay is difficult at such low resolution, but you pulled it off just fine. This felt very authentic too, like it really could have been an old game on a pre-iPhone smartphone.
I did have a slight balance concern. If I found a good sword upgrade on the first floor, I generally made it to floor 3+, but if I didn't, not so much. But that's a small issue, since restarting is very quick.