DescendThis is a game I worked on ages ago and never finished. Basically, it's a rougelike game like NetHack, and has a similar feel and interface to it. It also has graphics and stuff, woo. It's coded really badly (so I won't work on this version in the future), but the gameplay itself isn't that bad actually... Maybe in the future I'll remake it using DuskWolf?
It's controlled by the keyboard pretty much always, except when casting a spell or something, in which case you use the mouse to select a target. When you get prompted and the prompt contains ⨂, that's telling you to use the mouse. Terrible design, I know. Cookie to whoever finds the most spelling mistakes.