I nabbed The Legend of Dungeon off the humble store and have been playing it a bit over the last few days. Its a really fun hack-n-slash roguelike with a really beautiful pixel-art tone. I am not amazing yet, as seen in this video but its a pretty good walkthrough of how the game plays and how awesome it looks.

Like most roguelikes you can spend a few minutes playing or hours, its really up to you how many times you want to keep playing.