First of all, the game is just wonderful! It has exceeded all my expectations, which were very high. I am enjoying it enormously.
If I may, I have two small suggestions:
1- I agree with what others have said: it would be great to be able to move the character with the left joystick.
2- I think the food respawn time needs a little tweaking. As it is right now, you can wander around a few rooms, without even needing to change floors, and you won't be short of food.
Best regards and thank you very much for this precious gift.