Viability - things are working well! The game started where it was meant to, so no worries there! It would be awesome if the game could be made to work in browser, but I can get how that would be tough to make work.
Presentation - super clean. The only thing I'd change is the color of the date/time, as they blend into the background as they are.
Theme - clear, looking really good. Definitely feels like Discord or something of the like, it works really well.
Engagement - I was engaged! I'm interested to see where the game goes!