This is a very novel concept for the theme although I think it would've been better suited for a different kind of game. With this much enemies and this much speed in the game, limiting the player's resources can be frustrating at times. Doubly so when the enemies themselves can add to the amount of limited resources already imposed on you
I think this definitely would've been better suited for a slow paced or even turn based puzzle game where you had time to contemplate how your resources would've been used up.