Shiner is a un indie puzzle game that would be great for speedrunning. I suggest it is added for variety

https://www.speedrun.com/knowledgebase/supporthub/request-game-or-series

You waited 4 months to check back on this thread? The recent site update changed where you go for this, click on "Support" and select "New ticket" under the "Open a support ticket" section. Then select "Add a new game" and fill out the form.