First of All I like it! I was fan of the CastleFight Mod in Warcraft 3. and it's the same concept, but with no mining (only income and gold on enemy death) and with automatic Unit Production.
I love this genre and I love to see an other take on the genre ! and Woaw you did a multiplayer layer ! Nice !
then let's go for the review, UI is clear, i lost immediately the first time cause I couldn't figure how to produce a Railgun but that's on me and the second time I played was way better (even I i ended submerged by billions (there where 5 or 6) enemies Railgun and died.
the fact that you can't queue Unit Production can be a choice of you but it felt bad to me... and anyone who played any RTS will feel weird about it I think.
The Scout ... well I don't had the time to look around what's a good sign but then I found them a waist. (still keep them, it can be a nice EndGame Feature, when you will add more Units)
About the sound .... it's not good for the moment the sound overlap each other and the destruction sound isn't satisfying. But some tweek and with a Music track to cover it I think it will be cool (The UI / Robot Voice sound are great tho)
Other thing I can mention, the Zoom feels a bit clunky.
I played on Windows.
As I said, I like the Idea and I'm more than enjoying it, I hope to see nice improvements the next time ! Have Fun building this Game and see ya !