Boondoggle by Matthew Newell is a collection of word games with a very complete English dictionary, user profiles, and achievements as well as an original soundtrack. Read more about Boondoggle v0.2.0 (NDS Game)
Siroi Danmakukun is a distillation of what excites (or frightens, or terrorizes) many modern shmup players: insane patterns of bullets. The goal of the game is simply to survive as long as is humanly possible. Minimalistic graphics (you are a ball, as are the bullets), no sound, Japanese/English menus. You and the bullets. Read more about Siroi Danmakukun v1.5.8.1 (Pandora Game Port)