Hi,
I've tried your game.
The game gets repetitive pretty fast. Since there are only 3 tiles to place turrets on, there is barely any strategy involved. Most of the gameplay is just waiting for gold, buying turrets, combining them, and repeating the same thing over and over. I played around 5 runs and still could not beat the first boss, even after putting 2 points into every turret type.
If progress carries over between runs, I think upgrades should only be available after finishing a run in a separate menu.
The UI was also a bit confusing. The Play / How to Play / Deploy buttons were not very clear. A play button should just immediately start the game. After clicking it, I had to look around to figure out how to actually begin playing.
I know gameplay is the priority, but UI and UX still matter. Also, reset progress should definitely not be next to the play button.
Another thing that confused me was pressing Main Menu during gameplay. It takes you back to the same starting screen, so it does not really feel like a pause menu. It would be better to have a separate pause screen that clearly shows the game is paused.
Combining turrets is also a little messy right now. If you try to combine them and then cancel, the turrets often swap places, which gets annoying pretty quickly.
Other than that, not much else to say since it is a pretty small game. The shooting visual effects are ok though.
Hope this helps.
Regards,
Remi