Be mindful of the special objectives. Round 2 asks you not to leave any ice holes at the end of each round from there on. Round 3 and 4 ask you to minimize destructive damage (use as few explosive plants as possible, this includes the likes of Doom-shroom, Cherry Bomb and Bamboom, but does not include Potato Mine or Bamberry).
If you see the message “Too much damage was dealt to the ice surface…” that means you messed up. Simply follow what those objectives say and you won’t have to worry about the consequences.
