Elona's another graphical roguelike that might be worth checking out.
how about some free shmups:
Like some of Kenta Cho's games. rRootage is a boss rush game with dozens of stages for four gameplay modes based off of different shmups (like Ikaruga's polarity system). Tumiki fighters has defeated ships sticking to yours, the concept was remade as Blast Works for the Wii. Those are some of the better known ones. http://www.asahi-net.or.jp/~cs8k-cyu/index_e.html
x.x's Blue Wish and Eden series - Cave style games http://www004.upp.so-net.ne.jp/x_xgameroom
Warning Forever - Boss rush game where your performance influences the next boss. If you shoot off all the armor plates on the bottom first, then the next boss will have more guns and armor plates on the bottom. If you attack the sides first, then more armor plates and guns are added sticking out horizontally, etc. http://www.hikware.com/Prod/index.html#wf