The strategy of which unit to use made me think, I found it pretty tough to make the right decisions. It was difficult to visually parse the effectiveness of grass and cacti.

I had fun to get as far as I can. But I don't know how the most expensive thing works.

The music and sound effects on the other hand can be improved in my opinion.

I like the idea of the game and the logic you need for the game. I also think the art is fitting well.

I think the audio is missing, and the UI needs an improvement as well.

Overall the game is amazing, GL :)