Thank you for your feedback!!! I'm currently improving the game and adding more content :3 It'll be way easier in the next release!
And thank you for your response, I 'completed' the game. With 37 units and almost everything unlocked, though I gotta say, without a story or anything, why make it end? It seems like it'd be an endless grind-ish game. Although with a lot of units the game becomes a cakewalk, (also the risk of running out of materials) and with no saving I could see why.