needs an 'assign cherubs' button, it's really awkward to physically place them on the structures
hey, thank you for playing! we agree it's a bit weird to assign cherubs, especially at the zoomed out view early on. we've just added a quick notice in-game to let folks know that you can zoom in with the scroll wheel/new - + buttons on-screen.
there's also an upgrade at the Dorm to carry multiple cherubs at once (after upgrading the tower for the first time) so you just swipe across a bunch to pick them up all at once.
lastly, there's also a prestige unlock that lets you assign cherubs using right-click! it may have been hidden though (we just changed it so you can preview the unlocks sooner).