While this looks like something that might be interesting, the landing page has too little information to deduce what it is and how it compares to other similar tools. Having a screenshot, or a small demo video demonstrating how you use the tool would do wonders here.
As a separate note, Cmd + Space is used by Spotlight out of the box on macOS and is probably not a shortcut many people would like to give up. Using something else as your default shortcut and making it configurable might be a better approach.
The product has not so much features and is made with a minimalist leitmotiv.
I’m not trying to create some kind of marketing or comparative analysis, I built the tool that fits my needs and want to share it with you because that’s what hackers do.
Hope it can fit your needs too.
Also, you can find screenshots on the ProductHunt page.
As a separate note, Cmd + Space is used by Spotlight out of the box on macOS and is probably not a shortcut many people would like to give up. Using something else as your default shortcut and making it configurable might be a better approach.