The game is much more complex then it needs to be. The UI could be simplified and the tutorial both made shorter and more effective. The player doesn't need to know every bit of information, such as how far apart are enemies placed.
You could instead just say: [ 14 triangles and 2 circles VS 5 squares, 7 triangles and 2 circles ] That'd be much more effective than what you're currently doing.
Unfortunately these factors kinda kill an otherwise pretty cool game. If I don't understand the game I can't strategize and enjoy it. With a bit of work you could make this so much better, as it does have potential.