You should do that before rounds start when you place a wrong tower you get the 100% refund you paid for it, I hate to keep clicking the restart button
tip= dig near the ore shop and go down and then when you want to go down again and not to dig just go down the digged hole near the oreshop so you can get the ores and tehn go up and sell them fast. hope this tip help you ;) this game is awesome
Tutorial > Equipping