This is a very cute and fun game! I greatly enjoy the background music and love the premise of it! I admit, I've not yet seen a puzzle-matching tower defense like this before so it's definitely a lot of fun!
I wanted to continue my game after I paused it, but neither the P to unpause or the Q to quit worked, so I was unable to complete it. D:
Otherwise, definitely keep up your good work! You're doing an amazing job! <3