I mostly agree with Spylus, except for the poison part. I if he was pricked by poison, it would enter his bloodstream. His bloodstream must be moving because he is moving, even in the frozen time bubble. BUT, ENOUGH COMPLAINING. IT'S JUST A GAME! NOBODY SAID IT HAD TO BE REALISTIC!
Way better, and more fun then canabalt, which wasn't even that fun in the first place (Don't rate down this comment just because I said that, it's only an opinion), but to further the level of fun, you could add Upgrades, Various Enemies, Bosses (You would still be running but the boss would stay at the edge of the screen until you killed it), Money, Shops (Maybe able to purchase items or different backgrounds/terrain types), Badges, Kong API Highscore, Beastiary (if you make various kinds of enemies), Unlockables, Levels/Experience, and maybe even a Multiplayer Mode. These are some features that keep players rating 5/5 and supporting your game. Do this on the next Ninja Run, and I assure you, you will get the Weekly, if not, Monthly prize. And you definitely deserve it for making such a wonderful game.
They cannot add friction so stop complaining, because, as you can see, inserting friction into some of these levels would completely change the outcome and make some of them impossible. These levels were made and tested with no friction, thus they only work with no friction. To add friction they would have to change the levels, and if they changed the levels it wouldn't be a "Player Pack" anymore, it would be a "Player Edited by Creator Pack". For those of would with the rolling-forever-waiting-to-win problem, just restart the level until it works.