Thank you for the helpful feedback! I will definitely do that if I stay with this default control scheme.
If you click once within the game window to focus it that issue should go away.
What are the symptoms of a memory leak on your end? If there's substantial lag one issue is having the hardware acceleration setting in your browser turned off. Will look into the possible memory leak as well though.
Clicking in the game to focus didn’t work in Chrome. I was able to get it to work in Firefox.
The memory or performance issue when in chrome happened when I tried going back to the main menu from the game when stuck at the space bar bit from the tutorial. The screen was just the dark blue background with no menu items and my computer’s fan spun up like crazy and eventually Chrome began asking if I wanted to kill the page or wait it out.