Really nice art style and music! But in terms of gameplay, for me it was basically a "blind clicking and hoping for the best" fest. The reasons that made this happens, which I think are the bigger issues in the game, are:

1. It isn't clear on the map where the enemies will spawn, which makes it difficult to actually think on a great place to set the trap. A simple arrow pointing where they will spawn do the trick
2. The traps don't have their functionalities explained, so we don't know how to make them more effective and don't know which traps synergize together
3. The game doesn't give enough time for you to develop a strategy. So the best bet is to place random traps all over the stage