Some nice game idea might help a lot… "One room" was one of my least favorite choices.
For the moment i think I'll try implementing a simple top down action adventure in one room with constantly spawning enemies. An interesting challenge may be to implement some dynamic lightning. The room could be initially dark, and the player has to light it himself by carrying / placing torches on the ground.
I started coding some basic helper / framework classes. Still a long way until it resembles a game in any way…Going to sleep now.