Hey Guys!
Firstly the process of building and upgrading a tower is pretty intuitive. I would suggest a quick pop up when the game starts that tells the player to click on the store button. A little tip here would definitely add some accessibility. In order to improve the user interface I would add a large bar that shows the player base health and tower health. I for one didnt notice any of these elements outright and feel they are crucial to the game. I think the difficulty of the game is way to fast paced. Going from a round of all ground to all air right away feels like its taking away from the players learning curve. I would suggest a few ground unit rounds then an air unit then mixed units after that. I feel that gives the player a good amount of time to learn what each unit does and how it is defeated. As I stated earlier I did not notice any of the health counters. Not even the home base. I feel this needs to be much more obvious. Other than that I really like the art style of the game and it runs very smoothly.