Boulder Dash EX (U)(Mode7) is a North American or European release of the enhanced Boulder Dash game on GBA. The core gameplay involves navigating mazes and strategically manipulating boulders to clear paths and reach the exit. The 'Mode7' might refer to a specific graphical effect used in the game.  The developer responsible for the GBA port would require further research to determine definitively.

Boulder Dash EX (U)(Mode7)

Boukyaku no Senritsu (J)(Independent)