Bit too repetitive and dull. You have to constantly hold down left click on a button unless you want to lose a full half of your income. Each level you progress to resets you to zero while adding one or two extra upgrades but the goal to reach the next level also increases sharply, so you're waiting longer and longer while just...holding down left click and buying upgrades when the buttons light up. And after so many levels, you have to start scrolling through the list of upgrades, to add insult to injury. It only gets more tedious the deeper you get, but it's got a pretty good presentation, so if you can bear the waiting and either holding down the mouse button constantly or waiting twice as long to make progress, then sure, go ahead. Don't really recommend it, though. It's more shallow than it seems at first.