Puzzle App Friends: sorry this is my only post this week.  Just been very busy.
Duck Roll is a sokoban game.  The object is to get Your Duck to the black hole.
There are many innovations:
1. The red block is a 2x1.
2. The little red squares are mines that must be exploded.
3. Most of the levels have an upstairs & downstairs. Elevators.
4. Portals
5. Fire pit of death
6. Look at the 4th image: the two blue squares have to be destroyed to open the big blue one.
7. Want to solve everything using the fewest number of moves" The option is available.
8. There's more, but I'll let you discover them for yourself.
Here's what I don't like:
1. The graphics are sometimes not clear, at least to me, especially when there are multiple levels.
2. The ads are annoying. I paid $1.99 to remove them. Best 2 bucks spent. There are 128 levels and I've solved about 115.  Many are very tricky and require an 'aha' element.

The not-so-famous PAGY Awards are coming up.  This one has strong potential.

https://itunes.apple.com/us/app/duck-roll/id1122682633"mt=8
https://play.google.com/store/apps/details"id=com.mamau.duckroll

Other Good Sokoban Puzzles
A Good Snowman is Hard to Build
Go to Gold - superb
Go to Gold 2 - I hope a third version comes out.
Pepe Porcupine
Sokoban Cargo
Push Box Sokoban
Push Around
Boxed In - loved this. First in a series of 4.
Pengu Push
BoxWorld - awesome. I still remember struggling through levels 26 and 35 for ...