Some turrels cant be LOCKED OFF WITH VISION and cause ONLY CRUSH! Its consider all tier 6 turrels! AND ONLY THING left after 5000 wave is take some sun turrels with Leech? Electrifier and laser and up those! Almost all other cause troubles with memory... Mining - is almost USELESS! - main turrel will be just like SENTRY. GAME FULL OF BUGS and crushes in wave 5000+. Its take me 14 days to get wave 5000.... with all time working game and some time BP at 1H or 2H. All is up. Game at that moment have no future.