A fun strategy/management game that can keep you occupied for minutes or hours.
You are a babysitter to dwarfs. You use arrows, walls and dynamite to guide them towards treasures and away from danger. The dangers that await the dwarfs are lava, water and nasty creatures like goblins and spiders. And the dwarfs love looking for treasure, so much so that they will dig into a lava pit to find some. Fortunately you are given the tools to prevent this from hapening. You get guide arrows to switch their direction, dynamite to create holes for water and lava to flow in and walls to block the flow of water and slow the flow of lava. You can also seal up areas permanently by hardening rock, but this can cost a lot of gold (especially in the harder difficulties).
With the game's multiple mode, difficulty and time settings you can enjoy a nice long high score game, or go for a quick 5 minute hardcore challenge. There is also an alternate game, akin to a carnival shooting gallery (throwing axes/shooting at side scrolling targets), which can be fun for a bit.
For the achievement & perfect game collectors, this game offers a 2 for 1. Any achievement you get in the paid version will also be unlocked if you play the free version. The achievements themselves are fairly easy to get within a few hours. The only issue is that some of the achievements will not register in the paid version, unless you unlock them in the free version (you can meet the criteria in the paid version and not need to buy the dlc).
Overall a nice game, 7/10. Definitely worth picking up in a sale.
I wouldn't buy it out of sale (£7.99 / $9.99), but it may be worth it to some, so try the free version first.