Broken Bottles is a Yume Nikki fangame created by a user called "Doodle" (tumblr and pixiv accounts). You play as a young girl named Dokutsuki, who explores her subconscious by means of a chemistry set. The artistic motif is, as would be deduced, glass and bottles in various forms: maps, doorways, effects, etc. (chemical tubes could also be seen as "bottles"). It follow's Nikki's premise somewhat faithfully:
“It holds the same main idea as Yume Nikki, you explore a girl's subconscious by falling into an induced sleep and you find what may lie in her mind. You start out in a corridor of doors, pick the one you want to start in while you explore. The effects change what the character looks like and sometimes their abilities. If you equip the same effect twice, you will return to your normal self. Just wander around and enjoy.” — Doodle,on the game's Official Site
The game seems to be fairly well-received.
Characters
Dokutsuki is the main protagonist of Broken Bottles.
Chasers chase you around, they also appear in several events.