Yes, you are on the spot! This game was mainly a test to see how far I could take an upgrade system and if it's possible to make it procedural. Balance is surely lacking, and polish is sadly not sufficient.
Although I reply late, I've read this comment when you posted and applied your feedback in the game I've been working on for the last month.
To see your feedback applied, please play Clankers!
Thank you for your help :D