the controls are not so smoothly :( u really need to work on that... also sometimes the enemys just backdoor me... they go very low or too high and be like: oh you got a really huge armu there...i will just go from top.
This fact combined with the hard contros is really annoying since moving a single unit to catch him up can destroy yours armys potioning and even then it might not be enough fast to catch him up...to sum up i believe you need to fix the enemys routes
When changing tab (on the browser) game shouldnt pause so farming on lower levels (where the only thing you need to do is just wait for enemys to die) would be much less boring :)