This game is really fun! Its a really good concept and well polished! It did take quite a while to load and i do experience lagspikes sometime. Its something that reminds me of playing games on my ipad on a roadtrip... :Di rate it /10!
Thanks a lot ! Did you use the WebGL or PC version ? On PC it should run better, there are graphic presets you can chose :)
I did take some time to optimize the game for WebGL but that's still a LOT of mobs on screen at some point (Cap is 1000 if I recall)