Welcome to THE LEGEND OF BUBBLE BOBBLE. Where the only sound you'll hear is your own heart pounding as you race through 4 short dungeons to pay back Bob all those rupees you borrowed.
Controls:
WASD and N / M
OR
Arrow Keys and Z / X
Press R to restart game
Press ENTER to start / pause
Full screen button hidden in top right corner
Edit:
This game is fairly primitive as it's supposed to emulate the style of Bubble Bobble and The Legend of Zelda on the Nintendo Entertainment System.
Edit 2:
Thanks Tom for front page!
Update 25/04/2020: I've noticed that some things are tied to the monitor refresh rate so if you have anything other than 60hz the game breaks whoops.