Available in both 8.1 and UWP versions, this level-based (think Angry Birds) arcade game is immediately impressive, with quick loading times, smooth and cute animations, inventive puzzles, and atmospheric sound effects. A big hit, and note that it's actually completely free for exactly 12 hours following the publishing time of this Flow story, so be quick!

From the Store description:

This adorable game, set in the middle of a picturesque garden, has you helping Shiny, the cute little firefly, to find his babies. You’ll have to fly, run, hide and defend yourself against a legion of enemies. Stubborn mosquitoes, hungry toads, mischievous plants, sneaky wasps, endlessly long centipedes and lots of other little, dangerous garden dwellers are going to get in your way and make your life difficult.

Your reflexes will be tested, as well as your wit and intellect as you navigate through this beautiful, colorful world helping Shiny in his search. All kinds of different animations let you know how Shiny’s feeling. So you’ll always know if he’s feeling happy, concerned, tired or angry. That will help you solve the trickiest situations in the game. Use your ability to shine skillfully: the babies can only follow Shiny when he is lit up, but that also makes him visible to his enemies…

Here's Shiny The Firefly in action on my Lumia 950:

All very cartoony, but in a good way - very slick production values throughout...

An Angry Birds (classic) menu/world/level structure, and more 'coming soon' - in theory!

In addition to flying around, you'll need to get Shiny to budge objects and generally interact with the world, solving puzzles in terms of layout and blocked paths. Got to rescue those babies!

Wonderful flowing animations, including water and lighting effects, Shiny the Firefly is a visual treat.

The mechanics of exploring, collecting coins and extra lives, picking up the babies, avoiding or nullifying hazards, and then finally delivering the babies to the right collection point, are all logical and well presented.

Each level has a target number of babies to rescue - you'll often be able to rescue more, but meet the minimum and you can progress to the next level.

You can grab this for free here (until about midnight Wednesday, 21st March, UK time, after which it returns to £2 or so). It's a cracking arcade puzzler to work your way through on bus journeys and the like. Or maybe just curled up on the sofa. The Store entry has versions for Windows Phone 8.1 and also Windows 10/UWP, so everyone can join in the twilight puzzling fun.