I gave it a go. It's a pretty solid TD base.
Some thoughts:
- early waves feel a bit too difficult
- wave difficulty scales a bit weirdly
- tower balance felt a bit off with the cheapest tower having solid damage for its cost and others feeling like falling behind.
- escaping enemies don't give gold which can cause the game to spiral out of control
I'll give the Android version a try later as it's apparently level-based.