From the Store description:
Drag the mortar, aim, and fling the melon to collect the fruit! Whizzing through the air you’ll fly across the world, tapping and dragging your environment to release the juicy goods! Look out for pointy objects or you’ll explode on impact, sending melony chunks and pips flying! It’s a crazy, fruity, physics machine - launching its way onto Windows Phone!
Here's Mortar Melon in action:
The game is structured (currently) into three sets of 24 levels - the first one completely free (yay!), the second as a cheap in-app-purchase and the last yet to be completed by the developer. Still it'll take you a few weeks to figure out all the physics puzzles, by which time....(!)
Working my way through all the free levels - yes, no. 4 eluded me but by some fluke I scrambled through with one star and no fruit!!
As with Angry Birds, you can multi-touch zoom out to see the whole of the level - this usually helps when planning how you're going to tackle it! In this case, you fire the melon into the top section, collecting the loose fruit, then tap the locks in sequence to release the rest of the fruit and finally the melon. Easy - but remember these are still effectively the training levels!
Quite often the puzzle involves tricky timing - trying to swivel the mortar and draw it back to fire and release, all in time to catch the fruit at the right point in a falling or rising trajectory... Don't worry though, as you can have as many tries as you need.
As the levels progress, extra hazards appear, spikes and buzzsaws in particular...
Depending on how much fruit you gathered, stars are, of course, awarded, along with 'points'. If you're into that sort of thing. Me, I just want to see what's in the next level!!
The levels, ultimately, are roughly as easy/difficult as those in Angry Birds - you'll want to grab the second batch of 24 as they'll be harder and with no training elements. You can download Mortar Melon here for free in the Store, to get going.