Thank you very much :) all SFX were recorded and edited by me
About the rubber banding... Servers are in Europe, but even in EU they can be laggy. On my MacBook I can host a server with 1000 enemies without ny noticeable lag, but Heroku (the host) even struggles with 25 total enemies.
I regret not picking a better host like AWS/Azure, or maybe even adding an option to switch server between different regions. Oh well, now I have something to do post-launch :D