If you're up for a giggle and a puzzle then you should check out Odd Bot Out.
This isn't a random recommendation: it's the Free App of the Day over on the Amazon App Store. At the time of writing, you have 10 hours to pick it up for free.
In it, you play as a robot that gets dumped into a recycling facility, which you then must help it escape.
You do this by pulling it along with your finger, up steps, through doors, dodging dangers.
You also need to assemble machinery in order to open up the way. You even get to ride robot caterpillars.
We gave it a Silver Award, with our reviewer saying that it's a "clever and well put together platform puzzle [that] might leave you scratching your head from time to time, but it's worth it all the same."
If you haven't got it yet, Android players, now's the time to do so. Remember, you haven't got long if you want to save some pennies.