I think the concept is really cool and I like the whole aesthetics of the game! I think that adding more upgrades that introduce more strategy would be nice! Overall, I love the whole vibe of the game and I feel like the concept has a lot of potential! Great work!
Also, this is unrelated. I thought I recognized your profile picture and I realized that remembered your game from the Goedware game jam 14! It's cool I was able to find your game in the GMTK game jam too!