Endurance mode made even even even easier, swapping now enabled whilst things are falling (endurance only). If it still feels unresponsive the frame rate is probably getting too low. Try reducing the quality, click the button with the frame rate on it to change.
 "Crazy Mammoths"){kind=icon}
 "WetDiamonds"){kind=icon}
 "Dwarf on a Wharf"){kind=icon}
 "Boulder Basher"){kind=icon}
 "WetDike"){kind=icon}