I added this.x_velocity * = .98; this.y_velocity * = .98; in the player update function. (right after line 346 of bubbles.js) Controls become a lot easier,

I added this.x_velocity * = .98; this.y_velocity * = .98; in the player update function. (right after line 346 of bubbles.js) Controls become a lot easier, but that's my personal preference. You can add the lines in the chrome source inspector, then ctrl+s to save. No need to refresh :)