I will start by saying that this is a well polished game. I like playing it and it reminds me of some great tower defence titles that I played in the past and still play to this day. I can see that a lot of work has been put in this game.

Pros:

Nice overall aesthetic

Good sound design

Satisfying animations

Improvements:

Pressing spacebar to start the next round could be made more reliable

The tiles where the turrets can be placed on should be easily distinguished from the background, the background even though good looking, quite distracting at times

Would really benefit the game if there could be some kind of tutorial at the start to introduce the turrets and the enemy types

At around wave 52 the game starts to suffer from performance issues and that is where I stopped playing as the levels would take too long to finish with the lag

The game has a lot of potential and I would like to see it as a full title at some point. This is a nice project that can be turned into a fully fledged game with the right improvements! Looking forward to playing more of your titles.