just did a test run of the game and i can say it deffo has promise but there are some significant things i noticed that need work:
most noticeably it's the AI; both enemy and allied need work.
allied troops aggro very late or not at all if enemies are in range. this is especially bad with the ranged unit. some critical unit controls are not in the game; notably attack, attack move, Control groups. unit doesn't return to it's previous position after healing,...
enemy AI seems to be OK in most aspects, but if you wall off your base from the spawn area, for some reason they don't attack you like at all apart from a couple units
after saving and reloading due to null pointer exception, some miners and engineers just stopped working. not mining or constructing anything.
in order to incentivize ppl to move down floors, you can make it so there are specific resources that only appear on lower floors(for example: each floor you go down represents a tier of progression with each floor having a unique resource for upgrades). these resources could for example, provide upgrades to your units, buildings or be used to craft equipment for your king (note: maybe allow us to rename the king).
instead of starting with a mining post maybe start with a town hall or something, that when it is destroyed you lose. in that case it would also be nice to be able to dismantle and rebuild the town hall in lower floors. also representing your progress in the game.