A "Continue" button was neat, but scaling down to a NES 8-bit remake (Excute me a Demake) was kinda lame, just play the SNES Port or maybe download it for retroarch or raspberry pi, looks like some gameboy color game or gamegear game. Though playing this on a browser is good but not revolutionary.
It plays .nes .smc .sfc .gen .smd .mb .bin .gba .gbc .gb; so um "Can it play ".nds" ummm I'm think NO IT CAN'T, read what it plays before posting please. Or not yet anyway.