Just because quite a few of the last reviews state that the medals don't work, but they actually do now. (Just to help out if you're medal hunting!) They at least worked for me.
Super simple clicker game, starts off boringly slow, gets so easy towards the end that all of the medals can be unlocked in about 20 minutes. Has no replay value whatsoever without the medals though.
The big thing is that the game ends way too soon. (Even though it never ends) You get ton and ton of resources to spend, but no place to put it other than the same few upgrades and what's the point after that? Twice as many of the updates would make it more playable.
There's also the point that you have no clue what the upgrades do. You kind of figure it out, but there's no stats or even hints. Hovering your mouse over them should reveal some kind of details of why you should buy certain upgrades and what you should expect when buying them.