And so, finally here it is, public android version and I can test it out and... Okay, to be honest, game runs much better now, like really much better, but still main performance issue is here - navigation! When I'm not using it, game runs in at least 40+, maybe even 60+ fps, but whenever it's on, it drops somewhere below 20. Amd another huge progress - game doesn't crash browser anymore, at all! ... Buuut it instead crushes itself with this screen:
and you need to reload the page. I'm not a programmer, but it feels like or it does a hella lot of checks are you in the end point or not or it generates hella lot of ticks...or both, idk, but result is great lowering of game performance. And I don't know is there any mobile browser that runs stuff like this better than google, so this also could be the case at some point, though it's barely only game that has such problem, other, of they work, then or work well or at worst heat up the phone.
And small detail - it sometimes doesn't affect performance that much, but it can happen only if asteroid isn't far away, like in less than 5-6k away from you.