"The browser could not allocate enough memory for the WebGL content. If you are the developer of this content, try allocating less memory to your WebGL build in the WebGL player settings."
For level 27, go to the main menu and click score, on the top left of the menu you see a snake game, use the arrow keys to move the snake and get the squares until a trophy appears on the screen. Go back to the game and the gate is open.
Not getting the Achievement Addict badge. Anyone else having this problem? I've gotten all the achievements but it says "Best so far: 86." Such an annoying problem. Sending a Missing Achievement report.