LF Feedback on my TDS Base building game "Aim up!"

Suggest improvements, features, graphical changes, gameplay loop and balancing if you could.

It's a game not really done before where you build a base and defend waves of enemies. You can recruit units (e.g Grunts, Rocketeers, Medics), and place a range of defences like Sniper towers, Bunkers and cover positions for units to move to).

Thank you for reading I appreciate you. DM for the game link!