Well, a way to move the core upgrades so we can see them would be a nice update to this. As I said its a fun enough game, it just sucks that after a few upgrades, they just become impossible to see due to the game seemingly not allowing us to move up and down.
I've addressed this issue in today's upgrade. You should be able to scroll with mouse wheel, or by pressing the "scroll up/down" buttons, or by dragging the scroll bar.
