I don't mind the grind since I'm in no rush to beat the game and I love the huge amount of upgrades but the ads are really unstable and frequently leave messages stuck on the screen requiring a reload of the page.
I love, love this game other than the full-screen keyboard shortcut (F) being right next to the WASD movement keys. I accidentally hit F more than I'd like to admit. Maybe it would be nice to map to another key or allow us to disable that feature?
I really wish there was a way to cancel the running away action. I have found several times where I accidentally click away from the enemy so I start to run away while still taking damage.
If everyone complains about the lag then the developer should be wise enough to do something about it. A game that is practically unplayable by your entire audience serves no purpose. And Kongregate, why badge a game that so many people have problems playing?
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Thanks for advice, will implement it in new version