1. Would be nice to know which cells are upgraded and which aren't, without having to click on each individually all the time. 2. Would be great if cash can still accumulate in the background while you're buying upgrades, so if you can't afford something that second you can just wait instead of having to close / reopen the upgrade menu. 3. Option to re-view the tutorial again in case we forgot something while playing the game. 4. Clicking on a cell should highlight it, it took me a while to figure out that you have to click on a cell in order to see it's own upgrade menu - for a while I thought upgrading one cell upgraded everything, because there's no way to know which cells are upgraded and which aren't by looking at them. 5. Any way to go back to previous layers, or see what they're doing? 6. A total money earned per second, or some sort of tally would be nice to know where we are in the game - especially if we can't see what our lower rows are doing.
 "Beez"){kind=icon}
I'll see what I can do. I appreciate the feedback!