Kuudere Simulator

Kuudere Simulator is a simple short game where you can either play as a kuudere or a tsundere. This game is the exact opposite of Yandere Simulator. Kuudere-chan is unemotional. She doesn't want a Senpai at all and sits on a chair inside of a grey room. Tsundere-chan shows emotion through dialogue, doesn't want a Senpai (much like the kuudere), and stands in front of the chair with hands on her hips and head facing left. You may download it here.

Tsundere Mode
Pressing the 'T' key will unlock the hidden Tsundere Mode. The Tsundere says the exact same lines as Kuudere-chan except in an annoyed manner and with exclamation marks.

Baka
When in Tsundere Mode pressing 'B' will make Tsundere-chan say "Baka!".

Eye Patch
Pressing 'E' will attach an eye patch. (This was not mentioned in the trailer video.)

Trivia

 * Fans have given the main character the names, Kuudere-chan and Tsundere-chan (when in Tsundere mode).
 * The word "Baka" means "stupid", "idiot" or "absurd" in Japanese and is the most common trademark word in Tsundere characters.
 * Kuudere is a common personality trope in anime. Kuuderes show a cold-hearted and inexpressive behavior as they have difficulty recognizing their feelings. Differs from Tsundere since Tsundere is when the character frequently runs hot and cold between "tsun" and "dere". Kuudere is when the character only occasionally shows her caring and nice side on the inside.
 * Tsundere is a stereotypical anime personality. A tsundere will show aggressive/rude behavior towards the another character only to hide their softer, more caring side (as well as their romantic feelings). This personality is widely considered the antithesis of the Yandere personality. Name is derived from ‘tsuntsun’, meaning ‘ponted’, and ‘deredere’ meaning ‘sweet’.
 * Kuudere-Chan's and Tsundere-chan's appearances are references to Rei Ayanami (Kuudere) and Asuka Langley Soryu (Tsundere) from the anime Evangelion, respectively.
 * Kuudere-chan makes a small cameo in YandereDev's video, "I Want my Senpai Back".