There's a wave of "desktop games" on Steam. Most of them are Idle genre or tamagochi like.

For those I find these exoctic shaped windows are fun and a great differentiator.

Example:

https://store.steampowered.com/app/2666510/Rustys_Retirement...

Bundle with a ton of these games:

https://store.steampowered.com/bundle/48558/BottomOfYourScre...