Tethula

This is one of those games that will make you paranoid and twitchy every time a dwarf gets near a cave. You can choose an arcade of 5 minutes, 10 minutes, up to 60 minutes. The demo didn't really do the game justice as it doesn't give you the full fractiousness of the game, but it gets the general idea across. as of June 1st 2011 Steam has it on sale for $5 and I would tell everyone to buy it without even thinking, and you wont regret it.

I bought this game one week after it released and have enjoyed it tremendously. Yes its a simple 2d side scroller but its much more complex and winding than that. I have about 50 hours logged on it already and I am still planning on playing for at least that much more before I get tired of it (patch 1.05 coming out soon! $10 buy it!!!!!