The premise is simple - you're a carnivorous plant and you need to eat! You do this by bouncing across the screen and colliding with the various types of food on the screen, thus eating them. The more times you do this in a row, the higher a score multiplier you acquire and the more points you make.
Orange flies and birds can be eaten without any difficulty but there are more awkward prey. Some flies or birds are on fire and if you eat them, you're on fire too. A quick shake of the iDevice and all is fine though. Other creatures are ice based so you turn to ice upon impact, this time rubbing the iDevice solves that. Eventually you come across the likes of Pterosaurs and bats once you've grown to a sufficient size to be able to eat them.
The urge to achieve higher scores is always there with the added bonus of being able to post your scores to Facebook. The bouncing physics work quite well although it does take a bit of practice to really get the hang of things. Throughout the game, the visuals are cute and charming which also makes it quite appealing to younger players.
There's not much else to Primal Plant Attack. What you see really is what you get. Fortunately what you see is an easy to play game that is good fun. It's at a perfect price point which makes it a fun game to drop in for short or extended gaming sessions.