All objects have 3 health. Click the cats to do damage Toggle fullscreenClear and hit all objects in one click When they run out of health, a coin spawns in its place Should work with any amount of objects up to the clone limit
I made this in about 20 minutes so there may be bugs / inefficiencies The queue is not cleared instantaneously, meaning if a lot of enemies are defeated at once, the coins will show up one by one.