On my computer everything works fine but sometimes the prices hide. Plus I'd suggest $ 123.456.789 instead of $ 123456789, maybe adding an income per month and a shorter way to finish the game completely. But so far: I've definitely seen worse ;)
I really love your game, that's why I'm playing it since 5 months :) But I've got some little suggestions...
First, I'd love if the relics information wouldn't appear in front of the monsters but similar to the gilded heros information in a smaller size on the right side. So you can decide by yourself when to open them ;) For example if you use the ancient Juggernaut and your computer has slow performance, it's kinda difficult not to lose some of your clicking bonus.
Second, I think the button "buy all available upgrades" should be more at the top of the window, in a fixed placement, where you don't have to scroll down all the way and try to catch it while you level up your heroes very fast.
And as a last I'm very excited what you plan to let us do with the forge cores :)
Thanks for the great (addicting) game!