Eraser. Dotless Puzzle comes from the prolific Ruslan Goncharenko. I can't keep up with all his puzzle apps. The object is to get your snails and birds to scoop up the dots within a certain number of moves.
Snails move 1 square at a time.
Birds fly until they hit an object, or fly off the board.
Some puzzles, not all, have a switch button. See images 3 & 4.  When that is pushed, all the animals switch to the other.  Pushing the button counts as a move and can be pushed multiple times.
The grid sizes go from 4x4 to 8x8 with 1000 levels in each.  That's right, 5000 levels!

I've done about 10 levels.

https://itunes.apple.com/us/app/eraser-dotless-puzzle/id1257783912"mt=8
http://gruv-apps.com/index.php/en/

Other puzzles from Ruslan Goncharenko
Puzzle 4 Colors
Roll the labyrinth ball
Push It, Puzzle Edition
Hard Wood Puzzle
Push It, Sokoban Edition

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