So there seems a bug that when you have this game running in the background, instead of letting the text popups happen and disappear, they are being stored until the browser is reopened and then all happen in a rapid succession.
I was just going to piggyback on what P5ych0k1ll already said. It doesn't really make sense to have a "select all" hotkey when you can just hit x to send everyone or z to retreat everyone. But a Hero only hotkey would be good instead.
Ok so once you go to arena mode when you click on the two vendors to the right of the arena entrance it opens up your backpack first and you have to click on them again to open their shops. This makes it impossible to shop from the alchemist on the right side of the screen.
For chrome users in need of assistance type "about:plugins" in the web bar, when the plugins page opens click the details tab on the top right. then disable the first plugin on the top of the list. After doing such just refresh the game and it works like a charm. (Just repeat the process to re-enable the plugin so you stop getting annoying error messages while browsing other sites)
This is a great game and all, but most of the time I play these from my laptop. So, having AWSD as the only option for movement makes it kind of a pain to use the mouse to shoot because I prefer using my left hand for the mouse.
For level 23 warp back and forth 10 times on the edge of the screen. The Circle Power-up works by creating an invisible "explosion" when you kill an enemy with it. To use it kill an enemy near the shattered land areas to "blow up" the walls/floors etc.. Hope this helps.
Balls take too long to stop moving. Aiming should be a press and drag. The power function could actually be like you are pulling on the stick instead of just clicking.