Very nice game! Even being fairly simple, the gameplay is fun! My main recommendation would be to add some processing of materials, for example the motor factory could cost iron and steel to run? Otherwise the game is very well done!

Congrats on first game finished! That was pretty good for a first game!

I recommend you look into editing themes in godot. Some tooltips were really hard to read on top of the text of the component price, and it's really easy to change the tooltip theme so they are not transparent :)

Congratulations on finishing your first game! It's fun to scale up your factory and think about the best options to purchase.