Very fun RTS resource management game.
Just a little note on controls: As a long-tested RTS control, it is better to use the right click too.
Old C&C uses right click to cancel selection.
Modern RTS games only use left click to select, right click to issue orders.
and for the game pacing, you can add some bonus score if the player is doing really well, so that they can skip early game and progress in the game faster if it is the 2nd or 3rd time they play