Like probably many others, I made a few half-hearted attempts at this, and could never find the darned key in the snow. Finally, after several months, I came back to this, figured out the key, and got sucked in. Fun fun fun. Several hours is quite a bit to invest for a medium badge, but this is a great game!
Preschool Artist
Dude! You just completed the Preschool Artist achievement in Draw-Play 2 and won the Preschool Artist badge and 15 points!
Months ago I couldn't get past the first 5 levels or so, and now, all of a sudden, I figured the game out and won it in maybe an hour or so. Whew!
Spotless Desk
Dude! You just completed the Spotless Desk achievement in Desktop Tower Defense 1.5 and won the Spotless Desk badge and 30 points!
Finally! I think the fully-upgraded squirt towers made the difference....
Oh, and another comment for new and middling players here. I think that I actually didn't learn how to play the game well until I tried the challenges (after winning all the other badges). So I'd suggest you try the challenges FIRST.
Infinite Loop
Dude! You just completed the Infinite Loop achievement in loops of zen and won the Infinite Loop badge and 30 points!
Not too hard, more tedious than difficult. Yay!
Ick. It says something that this is the first card in six months I haven't gotten. The controls are not intuitive and things just don't work right. And I tried for several hours....
Frustrating indeed. And it wasn't until Level 35 that I found out how useful, even indispensable, the Anti-Matter shield is. I should've bought it as soon as I had a chance. Grrrr. But I finally got the last badge.