Hello, first of all, congrats for the game! 🚀
I liked the use of the tower concept here, though it took me a while to understand it.
The art style is cute, and I liked the palette you chose. The assets are a bit inconsistent though, the character and monster are very detailed, but the scenery and the trees are pretty much flat.
I played till level 6, and it was fun, I got some lag on my browser, but I think it's fine since you also provided a standalone version of the game.
This is a solid entry, the controls are good, and the mechanics well-implemented. Well done guys 👏