Thank you for the great feedback!
I am glad you noticed progression in the game, that was my latest focus to improve. I have a feeling with the current iteration the game finally found the shape that makes sense. I personally found that the combination of tower defense, bullet heaven and really light RTS makes some good results. There will be more changes for sure but the core feels right for me.
Probably you noticed but droids are just moving towers :D. It clearly moves the game more into a strategy game and supports the mechanic of using a few droids on the battlefield. For sure there will be a mini-map to more easily manage it but the moment when you switch between two droids you just start to play some kind of RTS game (multi-tasking and mineral harvesting)
Great you tried the orbital strike! It's still a prototype but I was testing the idea of supporting the battlefield from orbit. You are right it's not well balanced yet. Probably it should be stronger with a longer cooldown to make more sense. Anyway I feel the mechanic idea makes sense for the game and fiction.
My next focus is droid progression, I must prove I can make a good editor and overall building droids from modules. If I prove I can make it good, the game should be pretty much closer to the end of pre-production phase.