Loading time delays, add space from mobile. Don't play games on mobile simply too annoying, read a digitised book or watch a ripped movie from one of my DVDs, have to be careful bringing those ad artefacts back from the mobile platform.
I am starting to wonder with how much such a simple game slows down, whether these people are crypto currency mining using your computer.
People are doing other things besides killing time on this game. Going to drop it simply grinds to a halt.
Redo your calcs. You actually do not have to work through big numbers, recyle small ones, forget the decimals and factor them, just call them bigger numbers.
Wow the summon agent reroll is a lie, set list of crap ones you have to roll through to get good ones. Save it yourself and roll and import and roll and import and see the exact same crap ancients turn up every time. Lame arses.
the only way I would spend money on this game, is if I was trapped in a room and the only way out was to achieve a high level in this game. Rather than play the game I would spend the money
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If you are using Firefox x64, try with x86. That's the most reported cause for your issue.