Thank you ! I'm happy you liked the mood i created for the environemnt.
For performance issue, I'll suggest you to use a chromium based browser if you're not using one already (Chrome, Edge, Opera, Brave, ...) as non-chromium browsers like Firefox struggle alot with webgl games sadly.
You're right on the build aspect, i used as much time as i could and finished the 2nd level 15min away from the deadline, i'll make one if you're still interested in giving the game a second try :)