The "Death by Vanilla" Achievement is not awarded after completion.

The criteria are:
-Cast only Creature Spells with no abilities
-Cast at least 5 creature spells
-Do not play against Sparky or Direct Challenges
-Win the Game

I won a game in Standard by casting 6 mono-green creatures with no abilities (1x Bear Cub, 2x Jibbirik Omnivore, 2x Terrain, World Tyrant, 1x Gigantosaurus), and used vehicles (Lumbering Worldwagon) and enchantments (Garruk's Uprising) to get damage through and won by reducing my opponent's life total to <0.

After the game, I still did not receive credit for completing this achievement. This is frustrating, as the achievement is both difficult, and only available for a limited time.

I was playing on Android mobile, and am unable to download the game logs.