Great take on the theme and well executed, this is a good idea and quite easy to extend!
Positive:
- Very cool BGM and SFX
- Crispy pixel art
- Gameloop is short, easy to understand and feels great
Negative:
- the UI triggered me, sometimes effects are quite hard to read because of formatting (see below)
Miscs: I think by adding a grid system you could introduce adjacent building mechanics that you would allow you to add more depth to the game.
