since you're responsive i want to also report a UI bug when i have 3x zoom the upgrade and other buttons don't receive clicks on most left side about 10px, i have to click somewhere in middle then it works... otherwise it loses focus and doesn't upgrade... another feedback would be id like to build more towers without needing to select the tower again from the list... so its like a build mode feature i click from list and select build mode, and build as much as i want from the tower kind i have selected...