There's no API implemented currently, so It couldn't get badges anyway. A 4.00 score is usually when games get badges, but there are exceptions.
@OnSiteFtw, By rating the game lower, you are further lessening the likelihood of getting badges. BUT U IZ TROLL N I WAI
@Funkymonkey19 Your unit's stats DO increase, and you really should, notice but...
The way upgrading works is the increases are the same for every level. so you take the base stats (when you unlock it, or in this case, I don't know for mice) and add their upgrade stats per upgrade * 20
Also, if you would pay attention, you would notice the bar moves a little on the respective upgraded stats a little when you click the button, you know?
@Xexes255, This is to portray what time you took when you first solved, as you could simply take an image of it after solving and do it in under 30 seconds, You could always keep a record of it yourself, if you wanted to, see you.
@ClaudiaT
The hint button is activated upon clicking the button (Which I admit, I missed for a long time)
Upon which the hint button will enlarge slightly, you should notice it even if it's not exactly a huge change, Next, you click the area you want to be hinted on (3x3 sq?), See you.
Oh, and, I think part of the enjoyment of puzzle games comes from solving them yourself, but it is your choice to use the hint button with discretion.