The first run was quite frustrating as I had little time to look around and kept losing money each round :D. But once I understood how to use the towers, that I can sell them to get some money back, and that the multiplier is powerful, it was quite fun to figure out strategies! An upgrade I found very powerful is the "Squares replenish time" – especially if you have at least two, you can easily attain infinite money by repeatedly selling and placing a square. Albeit a flaw, it was fun to find :). Thanks for the game!