It took me a little while to understand the objective of the game, but once I understood it, I was able to win the first try!
I really like the Tower defense aspect of the game and if this improves further, i could be an interesting game
Just a couple of observations
I didn't get the Jam Theme, wich is 'Shopping'
And as others mentioned, i think the best strategy is to stay close to the deck and spam E + Clic