To change Jewel types, enter the following password during gameplay: hold the left and right triggers and left and right bumpers and press A.
To remove the background grid, enter the following password during gameplay: hold the left and right triggers and left and right bumpers and press B.
To unlock Finity Mode, complete 280 levels on Endless Mode.
To unlock Hyper Mode, complete eight levels on Action Mode.
To unlock Twilight Mode, complete seventeen levels on Classic Mode.